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Finding the Fourth Proportional to 667,753.52, 921,479.83 and 381,217.64

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Solution

The fourth proportional to 667,753.52, 921,479.83 and 381,217.64 is: 526,068.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,753.52 : 921,479.83 = 381,217.64 : x
  2. Step 2: Convert to fraction form
    667,753.52/921,479.83 = 381,217.64/x
  3. Step 3: Cross multiply
    667,753.52x = 921,479.83 × 381,217.64
  4. Step 4: Simplify right side
    667,753.52x = 351,284,360,539.76
  5. Step 5: Solve for x
    x = 351,284,360,539.76/667,753.52
  6. Step 6: Final answer
    x = 526,068.91

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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.