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Finding the Fourth Proportional to 431,481.48, 647,221.88 and 115,938.39

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Solution

The fourth proportional to 431,481.48, 647,221.88 and 115,938.39 is: 173,907.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,481.48 : 647,221.88 = 115,938.39 : x
  2. Step 2: Convert to fraction form
    431,481.48/647,221.88 = 115,938.39/x
  3. Step 3: Cross multiply
    431,481.48x = 647,221.88 × 115,938.39
  4. Step 4: Simplify right side
    431,481.48x = 75,037,861,164.12
  5. Step 5: Solve for x
    x = 75,037,861,164.12/431,481.48
  6. Step 6: Final answer
    x = 173,907.49

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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.