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Finding the Fourth Proportional to 308,634.91, 425,906.40 and 172,671.24

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Solution

The fourth proportional to 308,634.91, 425,906.40 and 172,671.24 is: 238,280.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,634.91 : 425,906.40 = 172,671.24 : x
  2. Step 2: Convert to fraction form
    308,634.91/425,906.40 = 172,671.24/x
  3. Step 3: Cross multiply
    308,634.91x = 425,906.40 × 172,671.24
  4. Step 4: Simplify right side
    308,634.91x = 73,541,788,456.60
  5. Step 5: Solve for x
    x = 73,541,788,456.60/308,634.91
  6. Step 6: Final answer
    x = 238,280.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.