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Mathematics 16 Online
OpenStudy (anonymous):

Use a proportion to solve this problem. Jim drove 324 miles in 6 hours. If he can keep the same pace, how long will it take him to drive 1,512 miles ? Help please.

OpenStudy (mathstudent55):

The question is how long it will take to drive. How long means time. We are looking for a time.

OpenStudy (mathstudent55):

We are told 6 hours to 324 miles We need to fins x hours to 1,512 miles. Ok so far?

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

yea

OpenStudy (anonymous):

what would be the formula i have to use ?

OpenStudy (mathstudent55):

Now each line that reads "____ to ____" is a ratio. 6 to 324 is the ratio 6/324 x to 1512 is the ratio x/1512 A proportion is when you set two ratios equal to each other. It's what we need here. \(\dfrac{6}{324} = \dfrac{x}{1512} \)

OpenStudy (mathstudent55):

Now we need to solve that equation. A proportion can be solved by cross multiplying. That means this: |dw:1406758656255:dw|

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