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Finding the Fourth Proportional to 547,781.62, 755,869.16 and 321,344.50

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Solution

The fourth proportional to 547,781.62, 755,869.16 and 321,344.50 is: 443,414.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,781.62 : 755,869.16 = 321,344.50 : x
  2. Step 2: Convert to fraction form
    547,781.62/755,869.16 = 321,344.50/x
  3. Step 3: Cross multiply
    547,781.62x = 755,869.16 × 321,344.50
  4. Step 4: Simplify right side
    547,781.62x = 242,894,397,285.62
  5. Step 5: Solve for x
    x = 242,894,397,285.62/547,781.62
  6. Step 6: Final answer
    x = 443,414.65

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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.