The stock market report says that 3 stocks went up for every 4 stocks that went down. If 504 stocks went down yesterday, how many went up? Set up and solve a proportion for the problem.
Let x be the number of stocks that went up.
We can set up the proportion:
3/4 = x/504.
Cross-multiplying, we have 4x = 3 * 504.
Combining like terms, we get 4x = 1512.
Dividing both sides by 4, we find that x = 378.
Thus, 378 stocks went up yesterday.