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Finding the Fourth Proportional to 540,320.28, 809,755.92 and 420,521.88

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Solution

The fourth proportional to 540,320.28, 809,755.92 and 420,521.88 is: 630,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,320.28 : 809,755.92 = 420,521.88 : x
  2. Step 2: Convert to fraction form
    540,320.28/809,755.92 = 420,521.88/x
  3. Step 3: Cross multiply
    540,320.28x = 809,755.92 × 420,521.88
  4. Step 4: Simplify right side
    540,320.28x = 340,520,081,819.53
  5. Step 5: Solve for x
    x = 340,520,081,819.53/540,320.28
  6. Step 6: Final answer
    x = 630,218.95

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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.