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Finding the Fourth Proportional to 715,062.52, 986,790.36 and 392,761.90

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Solution

The fourth proportional to 715,062.52, 986,790.36 and 392,761.90 is: 542,013.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,062.52 : 986,790.36 = 392,761.90 : x
  2. Step 2: Convert to fraction form
    715,062.52/986,790.36 = 392,761.90/x
  3. Step 3: Cross multiply
    715,062.52x = 986,790.36 × 392,761.90
  4. Step 4: Simplify right side
    715,062.52x = 387,573,656,695.28
  5. Step 5: Solve for x
    x = 387,573,656,695.28/715,062.52
  6. Step 6: Final answer
    x = 542,013.66

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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.