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Finding the Fourth Proportional to 547,487.20, 820,539.60 and 485,279.20

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Solution

The fourth proportional to 547,487.20, 820,539.60 and 485,279.20 is: 727,306.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,487.20 : 820,539.60 = 485,279.20 : x
  2. Step 2: Convert to fraction form
    547,487.20/820,539.60 = 485,279.20/x
  3. Step 3: Cross multiply
    547,487.20x = 820,539.60 × 485,279.20
  4. Step 4: Simplify right side
    547,487.20x = 398,190,800,656.32
  5. Step 5: Solve for x
    x = 398,190,800,656.32/547,487.20
  6. Step 6: Final answer
    x = 727,306.14

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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.