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Finding the Fourth Proportional to 486,355.32, 729,505.44 and 131,342.58

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Solution

The fourth proportional to 486,355.32, 729,505.44 and 131,342.58 is: 197,006.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,355.32 : 729,505.44 = 131,342.58 : x
  2. Step 2: Convert to fraction form
    486,355.32/729,505.44 = 131,342.58/x
  3. Step 3: Cross multiply
    486,355.32x = 729,505.44 × 131,342.58
  4. Step 4: Simplify right side
    486,355.32x = 95,815,126,613.64
  5. Step 5: Solve for x
    x = 95,815,126,613.64/486,355.32
  6. Step 6: Final answer
    x = 197,006.43

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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.