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Finding the Fourth Proportional to 487,540.20, 731,310.30 and 328,107.90

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Solution

The fourth proportional to 487,540.20, 731,310.30 and 328,107.90 is: 492,161.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,540.20 : 731,310.30 = 328,107.90 : x
  2. Step 2: Convert to fraction form
    487,540.20/731,310.30 = 328,107.90/x
  3. Step 3: Cross multiply
    487,540.20x = 731,310.30 × 328,107.90
  4. Step 4: Simplify right side
    487,540.20x = 239,948,686,781.37
  5. Step 5: Solve for x
    x = 239,948,686,781.37/487,540.20
  6. Step 6: Final answer
    x = 492,161.85

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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.