Finding the Fourth Proportional to 718,381.92, 991,355.10 and 396,121.80
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Solution
The fourth proportional to 718,381.92, 991,355.10 and 396,121.80 is: 546,641.49
Step by Step Solution
- Step 1: Write the proportion equation
718,381.92 : 991,355.10 = 396,121.80 : x - Step 2: Convert to fraction form
718,381.92/991,355.10 = 396,121.80/x - Step 3: Cross multiply
718,381.92x = 991,355.10 × 396,121.80 - Step 4: Simplify right side
718,381.92x = 392,697,366,651.18 - Step 5: Solve for x
x = 392,697,366,651.18/718,381.92 - Step 6: Final answer
x = 546,641.49
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.