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Finding the Fourth Proportional to 715,542.28, 987,472.02 and 393,263.80

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Solution

The fourth proportional to 715,542.28, 987,472.02 and 393,263.80 is: 542,717.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,542.28 : 987,472.02 = 393,263.80 : x
  2. Step 2: Convert to fraction form
    715,542.28/987,472.02 = 393,263.80/x
  3. Step 3: Cross multiply
    715,542.28x = 987,472.02 × 393,263.80
  4. Step 4: Simplify right side
    715,542.28x = 388,336,998,978.88
  5. Step 5: Solve for x
    x = 388,336,998,978.88/715,542.28
  6. Step 6: Final answer
    x = 542,717.06

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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.