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Finding the Fourth Proportional to 437,630.92, 656,446.40 and 138,134.80

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Solution

The fourth proportional to 437,630.92, 656,446.40 and 138,134.80 is: 207,202.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,630.92 : 656,446.40 = 138,134.80 : x
  2. Step 2: Convert to fraction form
    437,630.92/656,446.40 = 138,134.80/x
  3. Step 3: Cross multiply
    437,630.92x = 656,446.40 × 138,134.80
  4. Step 4: Simplify right side
    437,630.92x = 90,678,092,174.72
  5. Step 5: Solve for x
    x = 90,678,092,174.72/437,630.92
  6. Step 6: Final answer
    x = 207,202.21

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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.