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Finding the Fourth Proportional to 487,751.92, 731,861.20 and 172,357.36

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Solution

The fourth proportional to 487,751.92, 731,861.20 and 172,357.36 is: 258,618.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,751.92 : 731,861.20 = 172,357.36 : x
  2. Step 2: Convert to fraction form
    487,751.92/731,861.20 = 172,357.36/x
  3. Step 3: Cross multiply
    487,751.92x = 731,861.20 × 172,357.36
  4. Step 4: Simplify right side
    487,751.92x = 126,141,664,318.43
  5. Step 5: Solve for x
    x = 126,141,664,318.43/487,751.92
  6. Step 6: Final answer
    x = 258,618.49

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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.