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Finding the Fourth Proportional to 325,637.20, 488,974.20 and 220,920.40

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Solution

The fourth proportional to 325,637.20, 488,974.20 and 220,920.40 is: 331,732.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,637.20 : 488,974.20 = 220,920.40 : x
  2. Step 2: Convert to fraction form
    325,637.20/488,974.20 = 220,920.40/x
  3. Step 3: Cross multiply
    325,637.20x = 488,974.20 × 220,920.40
  4. Step 4: Simplify right side
    325,637.20x = 108,024,375,853.68
  5. Step 5: Solve for x
    x = 108,024,375,853.68/325,637.20
  6. Step 6: Final answer
    x = 331,732.30

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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.