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Finding the Fourth Proportional to 392,305.85, 588,402.88 and 126,031.91

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Solution

The fourth proportional to 392,305.85, 588,402.88 and 126,031.91 is: 189,029.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,305.85 : 588,402.88 = 126,031.91 : x
  2. Step 2: Convert to fraction form
    392,305.85/588,402.88 = 126,031.91/x
  3. Step 3: Cross multiply
    392,305.85x = 588,402.88 × 126,031.91
  4. Step 4: Simplify right side
    392,305.85x = 74,157,538,815.90
  5. Step 5: Solve for x
    x = 74,157,538,815.90/392,305.85
  6. Step 6: Final answer
    x = 189,029.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.