Finding the Fourth Proportional to 392,517.20, 585,757.18 and 390,271.88
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Solution
The fourth proportional to 392,517.20, 585,757.18 and 390,271.88 is: 582,406.47
Step by Step Solution
- Step 1: Write the proportion equation
392,517.20 : 585,757.18 = 390,271.88 : x - Step 2: Convert to fraction form
392,517.20/585,757.18 = 390,271.88/x - Step 3: Cross multiply
392,517.20x = 585,757.18 × 390,271.88 - Step 4: Simplify right side
392,517.20x = 228,604,555,862.10 - Step 5: Solve for x
x = 228,604,555,862.10/392,517.20 - Step 6: Final answer
x = 582,406.47
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.