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Finding the Fourth Proportional to 438,753.78, 658,230.03 and 139,252.50

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Solution

The fourth proportional to 438,753.78, 658,230.03 and 139,252.50 is: 208,910.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,753.78 : 658,230.03 = 139,252.50 : x
  2. Step 2: Convert to fraction form
    438,753.78/658,230.03 = 139,252.50/x
  3. Step 3: Cross multiply
    438,753.78x = 658,230.03 × 139,252.50
  4. Step 4: Simplify right side
    438,753.78x = 91,660,177,252.58
  5. Step 5: Solve for x
    x = 91,660,177,252.58/438,753.78
  6. Step 6: Final answer
    x = 208,910.29

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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.