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Finding the Fourth Proportional to 668,401.10, 1,002,601.65 and 519,101.90

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Solution

The fourth proportional to 668,401.10, 1,002,601.65 and 519,101.90 is: 778,652.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,401.10 : 1,002,601.65 = 519,101.90 : x
  2. Step 2: Convert to fraction form
    668,401.10/1,002,601.65 = 519,101.90/x
  3. Step 3: Cross multiply
    668,401.10x = 1,002,601.65 × 519,101.90
  4. Step 4: Simplify right side
    668,401.10x = 520,452,421,458.14
  5. Step 5: Solve for x
    x = 520,452,421,458.14/668,401.10
  6. Step 6: Final answer
    x = 778,652.85

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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.