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Finding the Fourth Proportional to 486,517.80, 727,808.40 and 427,468.80

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Solution

The fourth proportional to 486,517.80, 727,808.40 and 427,468.80 is: 639,473.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,517.80 : 727,808.40 = 427,468.80 : x
  2. Step 2: Convert to fraction form
    486,517.80/727,808.40 = 427,468.80/x
  3. Step 3: Cross multiply
    486,517.80x = 727,808.40 × 427,468.80
  4. Step 4: Simplify right side
    486,517.80x = 311,115,383,377.92
  5. Step 5: Solve for x
    x = 311,115,383,377.92/486,517.80
  6. Step 6: Final answer
    x = 639,473.79

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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.