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Finding the Fourth Proportional to 486,078.17, 728,422.25 and 356,981.85

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Solution

The fourth proportional to 486,078.17, 728,422.25 and 356,981.85 is: 534,962.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,078.17 : 728,422.25 = 356,981.85 : x
  2. Step 2: Convert to fraction form
    486,078.17/728,422.25 = 356,981.85/x
  3. Step 3: Cross multiply
    486,078.17x = 728,422.25 × 356,981.85
  4. Step 4: Simplify right side
    486,078.17x = 260,033,520,601.25
  5. Step 5: Solve for x
    x = 260,033,520,601.25/486,078.17
  6. Step 6: Final answer
    x = 534,962.36

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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.