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Finding the Fourth Proportional to 578,046.30, 869,143.05 and 486,807.90

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Solution

The fourth proportional to 578,046.30, 869,143.05 and 486,807.90 is: 731,958.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,046.30 : 869,143.05 = 486,807.90 : x
  2. Step 2: Convert to fraction form
    578,046.30/869,143.05 = 486,807.90/x
  3. Step 3: Cross multiply
    578,046.30x = 869,143.05 × 486,807.90
  4. Step 4: Simplify right side
    578,046.30x = 423,105,702,970.10
  5. Step 5: Solve for x
    x = 423,105,702,970.10/578,046.30
  6. Step 6: Final answer
    x = 731,958.15

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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.