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Finding the Fourth Proportional to 438,930.45, 658,395.72 and 123,387.39

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Solution

The fourth proportional to 438,930.45, 658,395.72 and 123,387.39 is: 185,081.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,930.45 : 658,395.72 = 123,387.39 : x
  2. Step 2: Convert to fraction form
    438,930.45/658,395.72 = 123,387.39/x
  3. Step 3: Cross multiply
    438,930.45x = 658,395.72 × 123,387.39
  4. Step 4: Simplify right side
    438,930.45x = 81,237,729,477.97
  5. Step 5: Solve for x
    x = 81,237,729,477.97/438,930.45
  6. Step 6: Final answer
    x = 185,081.10

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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.