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Finding the Fourth Proportional to 539,037.20, 807,389.40 and 479,939.60

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Solution

The fourth proportional to 539,037.20, 807,389.40 and 479,939.60 is: 718,870.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,037.20 : 807,389.40 = 479,939.60 : x
  2. Step 2: Convert to fraction form
    539,037.20/807,389.40 = 479,939.60/x
  3. Step 3: Cross multiply
    539,037.20x = 807,389.40 × 479,939.60
  4. Step 4: Simplify right side
    539,037.20x = 387,498,145,680.24
  5. Step 5: Solve for x
    x = 387,498,145,680.24/539,037.20
  6. Step 6: Final answer
    x = 718,870.88

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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.