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Finding the Fourth Proportional to 529,147.38, 730,236.56 and 287,429.88

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Solution

The fourth proportional to 529,147.38, 730,236.56 and 287,429.88 is: 396,660.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,147.38 : 730,236.56 = 287,429.88 : x
  2. Step 2: Convert to fraction form
    529,147.38/730,236.56 = 287,429.88/x
  3. Step 3: Cross multiply
    529,147.38x = 730,236.56 × 287,429.88
  4. Step 4: Simplify right side
    529,147.38x = 209,891,805,375.26
  5. Step 5: Solve for x
    x = 209,891,805,375.26/529,147.38
  6. Step 6: Final answer
    x = 396,660.39

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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.