Setting up Proportions and Solving

Front

What is a proportion?

Back

A proportion is when two ratios are equivalent and show the same value.

Front

If 3 meals cost $27, how much do 12 meals cost?

Back

$108

Front

In a survey of 50 students, 30 liked pizza. If 190 students were surveyed, how many would like pizza?

Back

114 students would list pizza as a favorite food.

Front

Back

x = 2

Front

What is the first step in setting up a proportion?

Back

Identify the two ratios that you want to compare.

Front

How do you cross-multiply in a proportion?

Back

Multiply the numerator of one ratio by the denominator of the other ratio.

Front

Back

a * d = b * c.

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship or value.

Front

If 5 apples cost $10, how much do 8 apples cost?

Back

$16.

Front

What is the formula for finding a missing value in a proportion?

Back