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Finding the Fourth Proportional to 498,342.60, 747,513.90 and 428,358.60

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Solution

The fourth proportional to 498,342.60, 747,513.90 and 428,358.60 is: 642,537.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,342.60 : 747,513.90 = 428,358.60 : x
  2. Step 2: Convert to fraction form
    498,342.60/747,513.90 = 428,358.60/x
  3. Step 3: Cross multiply
    498,342.60x = 747,513.90 × 428,358.60
  4. Step 4: Simplify right side
    498,342.60x = 320,204,007,684.54
  5. Step 5: Solve for x
    x = 320,204,007,684.54/498,342.60
  6. Step 6: Final answer
    x = 642,537.90

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Similar ratio
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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.