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Finding the Fourth Proportional to 667,371.32, 921,137.22 and 381,057.48

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Solution

The fourth proportional to 667,371.32, 921,137.22 and 381,057.48 is: 525,953.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,371.32 : 921,137.22 = 381,057.48 : x
  2. Step 2: Convert to fraction form
    667,371.32/921,137.22 = 381,057.48/x
  3. Step 3: Cross multiply
    667,371.32x = 921,137.22 × 381,057.48
  4. Step 4: Simplify right side
    667,371.32x = 351,006,227,787.41
  5. Step 5: Solve for x
    x = 351,006,227,787.41/667,371.32
  6. Step 6: Final answer
    x = 525,953.42

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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.