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Finding the Fourth Proportional to 715,366.70, 987,291.87 and 429,044.30

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Solution

The fourth proportional to 715,366.70, 987,291.87 and 429,044.30 is: 592,132.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,366.70 : 987,291.87 = 429,044.30 : x
  2. Step 2: Convert to fraction form
    715,366.70/987,291.87 = 429,044.30/x
  3. Step 3: Cross multiply
    715,366.70x = 987,291.87 × 429,044.30
  4. Step 4: Simplify right side
    715,366.70x = 423,591,949,259.84
  5. Step 5: Solve for x
    x = 423,591,949,259.84/715,366.70
  6. Step 6: Final answer
    x = 592,132.61

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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.