Finding the Fourth Proportional to 319,220.63, 478,839.80 and 79,324.84
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Solution
The fourth proportional to 319,220.63, 478,839.80 and 79,324.84 is: 118,989.46
Step by Step Solution
- Step 1: Write the proportion equation
319,220.63 : 478,839.80 = 79,324.84 : x - Step 2: Convert to fraction form
319,220.63/478,839.80 = 79,324.84/x - Step 3: Cross multiply
319,220.63x = 478,839.80 × 79,324.84 - Step 4: Simplify right side
319,220.63x = 37,983,891,317.49 - Step 5: Solve for x
x = 37,983,891,317.49/319,220.63 - Step 6: Final answer
x = 118,989.46
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.