Finding the Fourth Proportional to 698,721.12, 964,117.35 and 392,757.12
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Solution
The fourth proportional to 698,721.12, 964,117.35 and 392,757.12 is: 541,938.61
Step by Step Solution
- Step 1: Write the proportion equation
698,721.12 : 964,117.35 = 392,757.12 : x - Step 2: Convert to fraction form
698,721.12/964,117.35 = 392,757.12/x - Step 3: Cross multiply
698,721.12x = 964,117.35 × 392,757.12 - Step 4: Simplify right side
698,721.12x = 378,663,953,728.03 - Step 5: Solve for x
x = 378,663,953,728.03/698,721.12 - Step 6: Final answer
x = 541,938.61
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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.