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Finding the Fourth Proportional to 629,169.12, 868,443.12 and 428,081.76

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Solution

The fourth proportional to 629,169.12, 868,443.12 and 428,081.76 is: 590,881.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,169.12 : 868,443.12 = 428,081.76 : x
  2. Step 2: Convert to fraction form
    629,169.12/868,443.12 = 428,081.76/x
  3. Step 3: Cross multiply
    629,169.12x = 868,443.12 × 428,081.76
  4. Step 4: Simplify right side
    629,169.12x = 371,764,659,269.49
  5. Step 5: Solve for x
    x = 371,764,659,269.49/629,169.12
  6. Step 6: Final answer
    x = 590,881.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.