Proportions Review - PM Classes

Front

What is a proportion?

Back

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

Front

How do you determine if two ratios form a proportion?

Back

Two ratios form a proportion if the cross products are equal.

Front

What is the cross product of the ratios a/b and c/d?

Back

The cross product is a*d and b*c.

Front

If 1/2 = x/8, what is the value of x?

Back

x = 4.

Front

What is the relationship between ratios in a proportion?

Back

The ratios are equivalent.

Front

If a recipe calls for 2 cups of sugar for every 3 cups of flour, how much sugar is needed for 9 cups of flour?

Back

6 cups of sugar.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined into a single unit.

Front

If 5 apples cost $2.50, what is the cost per apple?

Back

$0.50 per apple.

Front

How can you use proportions to solve real-world problems?

Back

You can set up a proportion based on the relationships between quantities and solve for the unknown.

Front

If a car travels 150 miles in 3 hours, what is the speed in miles per hour?

Back

50 miles per hour.