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Finding the Fourth Proportional to 715,061.52, 986,788.98 and 392,760.90

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Solution

The fourth proportional to 715,061.52, 986,788.98 and 392,760.90 is: 542,012.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,061.52 : 986,788.98 = 392,760.90 : x
  2. Step 2: Convert to fraction form
    715,061.52/986,788.98 = 392,760.90/x
  3. Step 3: Cross multiply
    715,061.52x = 986,788.98 × 392,760.90
  4. Step 4: Simplify right side
    715,061.52x = 387,572,127,894.88
  5. Step 5: Solve for x
    x = 387,572,127,894.88/715,061.52
  6. Step 6: Final answer
    x = 542,012.28

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1.5x scale

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.