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Finding the Fourth Proportional to 488,257.79, 731,511.88 and 172,513.31

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Solution

The fourth proportional to 488,257.79, 731,511.88 and 172,513.31 is: 258,460.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,257.79 : 731,511.88 = 172,513.31 : x
  2. Step 2: Convert to fraction form
    488,257.79/731,511.88 = 172,513.31/x
  3. Step 3: Cross multiply
    488,257.79x = 731,511.88 × 172,513.31
  4. Step 4: Simplify right side
    488,257.79x = 126,195,535,723.12
  5. Step 5: Solve for x
    x = 126,195,535,723.12/488,257.79
  6. Step 6: Final answer
    x = 258,460.88

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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.