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Finding the Fourth Proportional to 667,711.70, 921,443.07 and 361,791.41

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Solution

The fourth proportional to 667,711.70, 921,443.07 and 361,791.41 is: 499,272.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,711.70 : 921,443.07 = 361,791.41 : x
  2. Step 2: Convert to fraction form
    667,711.70/921,443.07 = 361,791.41/x
  3. Step 3: Cross multiply
    667,711.70x = 921,443.07 × 361,791.41
  4. Step 4: Simplify right side
    667,711.70x = 333,370,182,922.81
  5. Step 5: Solve for x
    x = 333,370,182,922.81/667,711.70
  6. Step 6: Final answer
    x = 499,272.64

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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.