The stock market report says that 4 stocks went up for every 5 stocks that went down. If 635 stocks went down yesterday, how many went up? Set up and solve a proportion for the problem.

Answer 1

Let's set up a proportion to solve the problem:

up / down = 4 / 5

Since we know that 635 stocks went down, we can substitute that into the equation:

up / 635 = 4 / 5

To solve for "up," we cross-multiply:

5 * up = 635 * 4

Simplifying:

5up = 2540

Finally, divide both sides by 5 to solve for "up":

up = 2540 / 5 = 508

Therefore, 508 stocks went up.