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Finding the Fourth Proportional to 493,377.12, 740,010.60 and 138,404.88

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Solution

The fourth proportional to 493,377.12, 740,010.60 and 138,404.88 is: 207,591.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,377.12 : 740,010.60 = 138,404.88 : x
  2. Step 2: Convert to fraction form
    493,377.12/740,010.60 = 138,404.88/x
  3. Step 3: Cross multiply
    493,377.12x = 740,010.60 × 138,404.88
  4. Step 4: Simplify right side
    493,377.12x = 102,421,078,291.73
  5. Step 5: Solve for x
    x = 102,421,078,291.73/493,377.12
  6. Step 6: Final answer
    x = 207,591.87

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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.