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Finding the Fourth Proportional to 402,486.60, 603,729.90 and 396,581.70

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Solution

The fourth proportional to 402,486.60, 603,729.90 and 396,581.70 is: 594,872.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,486.60 : 603,729.90 = 396,581.70 : x
  2. Step 2: Convert to fraction form
    402,486.60/603,729.90 = 396,581.70/x
  3. Step 3: Cross multiply
    402,486.60x = 603,729.90 × 396,581.70
  4. Step 4: Simplify right side
    402,486.60x = 239,428,230,082.83
  5. Step 5: Solve for x
    x = 239,428,230,082.83/402,486.60
  6. Step 6: Final answer
    x = 594,872.55

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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.