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Finding the Fourth Proportional to 667,419.27, 921,036.36 and 361,494.90

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Solution

The fourth proportional to 667,419.27, 921,036.36 and 361,494.90 is: 498,861.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,419.27 : 921,036.36 = 361,494.90 : x
  2. Step 2: Convert to fraction form
    667,419.27/921,036.36 = 361,494.90/x
  3. Step 3: Cross multiply
    667,419.27x = 921,036.36 × 361,494.90
  4. Step 4: Simplify right side
    667,419.27x = 332,949,946,854.56
  5. Step 5: Solve for x
    x = 332,949,946,854.56/667,419.27
  6. Step 6: Final answer
    x = 498,861.75

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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.