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Finding the Fourth Proportional to 308,542.78, 425,828.46 and 172,584.28

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Solution

The fourth proportional to 308,542.78, 425,828.46 and 172,584.28 is: 238,188.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,542.78 : 425,828.46 = 172,584.28 : x
  2. Step 2: Convert to fraction form
    308,542.78/425,828.46 = 172,584.28/x
  3. Step 3: Cross multiply
    308,542.78x = 425,828.46 × 172,584.28
  4. Step 4: Simplify right side
    308,542.78x = 73,491,298,172.61
  5. Step 5: Solve for x
    x = 73,491,298,172.61/308,542.78
  6. Step 6: Final answer
    x = 238,188.36

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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.