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 two ratios and set the products equal to each other.

Front

If a car travels 120 miles in 3 hours, what is its speed in miles per hour?

Back

40 miles per hour.

Front

If a car travels at a constant speed of 40 miles per hour, how long will it take to travel 200 miles?

Back

5 hours.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit.

Front

If Josh bought a pizza with 8 slices for $12, what is the cost per slice?

Back

$1.50 per slice.

Front

How do you find the cost per item in a total cost?

Back

Divide the total cost by the number of items.

Front

If 4 big water bottles hold 8 gallons, how much does 1 big water bottle hold?

Back

2 gallons.

Front

If 3 big water bottles hold how many gallons?

Back

6 gallons.

Front

What is the relationship between ice cream cones and brownies sold if there are 5 cones for every 3 brownies?

Back

The ratio of ice cream cones to brownies is 5:3.