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Finding the Fourth Proportional to 487,906.10, 731,859.15 and 172,394.90

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Solution

The fourth proportional to 487,906.10, 731,859.15 and 172,394.90 is: 258,592.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,906.10 : 731,859.15 = 172,394.90 : x
  2. Step 2: Convert to fraction form
    487,906.10/731,859.15 = 172,394.90/x
  3. Step 3: Cross multiply
    487,906.10x = 731,859.15 × 172,394.90
  4. Step 4: Simplify right side
    487,906.10x = 126,168,784,978.34
  5. Step 5: Solve for x
    x = 126,168,784,978.34/487,906.10
  6. Step 6: Final answer
    x = 258,592.35

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Similar ratio
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1.5x scale

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.