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Finding the Fourth Proportional to 668,363.10, 1,002,544.65 and 621,123.90

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Solution

The fourth proportional to 668,363.10, 1,002,544.65 and 621,123.90 is: 931,685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,363.10 : 1,002,544.65 = 621,123.90 : x
  2. Step 2: Convert to fraction form
    668,363.10/1,002,544.65 = 621,123.90/x
  3. Step 3: Cross multiply
    668,363.10x = 1,002,544.65 × 621,123.90
  4. Step 4: Simplify right side
    668,363.10x = 622,704,442,932.14
  5. Step 5: Solve for x
    x = 622,704,442,932.14/668,363.10
  6. Step 6: Final answer
    x = 931,685.85

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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.