Math 3 - 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 unknown variable.

Front

What is the formula for finding the unit rate?

Back

The unit rate is found by dividing the total amount by the number of units, expressed as 'amount per unit'.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.

Front

How can you express the ratio 5 to 3 as a fraction?

Back

The ratio 5 to 3 can be expressed as the fraction 5/3.

Front

What is the cost of one slice of pizza if a pizza with 8 slices costs $12?

Back

The cost of one slice of pizza is $1.50.

Front

In a class, the ratio of boys to girls is 4 to 5. If there are 20 boys, how many girls are there?

Back

There are 25 girls.

Front

If Jeff runs 6 miles in 4 hours, what is his speed in miles per hour?

Back

His speed is 1.5 miles per hour.

Front

What is the first step in solving the proportion 3/4 = x/12?

Back

Cross-multiply to get 3 * 12 = 4 * x.

Front

If the ratio of dogs to cats in a shelter is 5 to 3 and there are 25 dogs, how many cats are there?

Back

There are 15 cats.