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Finding the Fourth Proportional to 667,794.39, 921,376.94 and 381,257.43

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Solution

The fourth proportional to 667,794.39, 921,376.94 and 381,257.43 is: 526,032.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,794.39 : 921,376.94 = 381,257.43 : x
  2. Step 2: Convert to fraction form
    667,794.39/921,376.94 = 381,257.43/x
  3. Step 3: Cross multiply
    667,794.39x = 921,376.94 × 381,257.43
  4. Step 4: Simplify right side
    667,794.39x = 351,281,802,299.38
  5. Step 5: Solve for x
    x = 351,281,802,299.38/667,794.39
  6. Step 6: Final answer
    x = 526,032.87

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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.