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Finding the Fourth Proportional to 667,754.52, 921,481.21 and 381,218.64

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Solution

The fourth proportional to 667,754.52, 921,481.21 and 381,218.64 is: 526,070.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,754.52 : 921,481.21 = 381,218.64 : x
  2. Step 2: Convert to fraction form
    667,754.52/921,481.21 = 381,218.64/x
  3. Step 3: Cross multiply
    667,754.52x = 921,481.21 × 381,218.64
  4. Step 4: Simplify right side
    667,754.52x = 351,285,813,661.75
  5. Step 5: Solve for x
    x = 351,285,813,661.75/667,754.52
  6. Step 6: Final answer
    x = 526,070.29

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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.