Solving Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

Front

What does it mean if two ratios form a proportion?

Back

It means that the two ratios are equivalent, or that they represent the same relationship.

Front

Back

r = 32

Front

If a 6-ounce package contains 45 pieces, how many pieces are in a 10-ounce package?

Back

75 pieces

Front

What is the cross-multiplication method?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio.

Front

Solve for x: 5/10 = x/20

Back

x = 10

Front

What is the first step in solving a proportion?

Back

Identify the two ratios that are being compared.

Front

Back

No, they are not equal.

Front

Back

The cross products are equal: a*d = b*c.