In this video they are showing how to use proportions to solve word problems. In the first example they used 2/3 is equal to x/6. To solve for x, you begin by cross multiplying setting up and equation 3x=12. Next, divide 12 by 3 which equals 4. So x equals 4. In the next example, she has given a situation where she is making a ranch dip using a ranch powder and sour cream. She want to use 80oz of sour cream and she wants to know how much powder ranch she will need. She know that for 16oz of sour cream she needs to use 3 tablespoons of powder. So to solve this problem she sets up a proportion equation such as this, 3/16 = x/30. She solves this by first cross multiplying 16x=240. Next she will divide 240 by 16, which equals 15 so she know she has to use 15 tablespoons of powder ranch in 80oz of sour cream to make her dip.
 Hot
 Latest

How To: Remember "greater than" & "less than" symbols

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Figure out the domain & range of a piecewise function

How To: Do long division without a calculator

How To: Find the formula of a piecewise function given a graph

How To: Find and sketch the domain of a multivariable function

How To: Find the area & perimeter of triangles & squares

How To: Evaluate factorials with a TI83 calculator

How To: Find a number given Its percent

How To: Find the Slope Given 2 Ordered Pairs

How To: Subtract a mixed number from a proper fraction in basic math

How To: Calculate percent composition for chemistry

How To: Find the Percent Given Two Numbers

How To: Calculate probability in "at least one" problems

How To: Find the slope from a set of points

How To: Find the equation of a circle given: center & tangent

How To: Learn Calculus in 20 minutes

How To: Find density using the water displacement method

How To: Calculate percent error in chemistry lab activities

How To: Graph the greatest Integer or floor function

How To: Remember "greater than" & "less than" symbols

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Figure out the domain & range of a piecewise function

How To: Do long division without a calculator

How To: Find the formula of a piecewise function given a graph

How To: Find and sketch the domain of a multivariable function

How To: Find the area & perimeter of triangles & squares

How To: Evaluate factorials with a TI83 calculator

How To: Find a number given Its percent

How To: Find the Slope Given 2 Ordered Pairs

How To: Subtract a mixed number from a proper fraction in basic math

How To: Calculate percent composition for chemistry

How To: Find the Percent Given Two Numbers

How To: Calculate probability in "at least one" problems

How To: Find the slope from a set of points

How To: Find the equation of a circle given: center & tangent

How To: Learn Calculus in 20 minutes

How To: Find density using the water displacement method

How To: Calculate percent error in chemistry lab activities

How To: Graph the greatest Integer or floor function
Be the First to Comment
Share Your Thoughts