Proportion - Word Problems

Front

What is a proportion?

Back

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

Front

How do you set up a proportion to solve a word problem?

Back

Identify the two ratios involved in the problem and set them equal to each other.

Front

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

Back

If a/b = c/d, then ad = bc.

Front

If a car travels 320 miles in 7.5 hours, how do you find the speed?

Back

Speed = Distance / Time = 320 miles / 7.5 hours = 42.67 miles per hour.

Front

How do you find the distance traveled if you know the speed and time?

Back

Distance = Speed x Time.

Front

If a recipe calls for 1.5 cups of milk for 3 cups of flour, what is the ratio of milk to flour?

Back

The ratio of milk to flour is 1.5:3 or 1:2.

Front

What happens to the amount of milk if the amount of flour is increased in a recipe?

Back

The amount of milk must also increase to maintain the same ratio.

Front

How do you calculate the time it takes to travel a certain distance at a constant speed?

Back

Time = Distance / Speed.

Front

If a bird flies 35 meters in 10 seconds, what is its speed?

Back

Speed = Distance / Time = 35 meters / 10 seconds = 3.5 meters per second.

Front

How do you find the total number of items produced over a period of time?

Back

Total items = Rate of production x Time.