Question 156430
Corey walked 5 miles in 1.5 hours, which could be expressed as the ration 1.5 hours:5 miles. The details for the new walkathon of 3 miles will be, in the same pattern, x hours: 3 miles.

The proportion to solve is: {{{1.5/5 = x/3}}}
To solve for x, multiply both sides by 3:
{{{(3/1)(1.5/5)=(3/1)(x/3)}}}

Simplifying, we have:
{{{4.5/5 = x}}}
.9 = x

So, Corey will take .9 hours to walk 3 miles.

Let's put the result into our original proportion to make sure it's correct:
{{{1.5/5 = .9/3}}}
{{{.3 = .3}}}