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Finding the Fourth Proportional to 667,377.32, 921,145.50 and 381,063.48

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Solution

The fourth proportional to 667,377.32, 921,145.50 and 381,063.48 is: 525,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,377.32 : 921,145.50 = 381,063.48 : x
  2. Step 2: Convert to fraction form
    667,377.32/921,145.50 = 381,063.48/x
  3. Step 3: Cross multiply
    667,377.32x = 921,145.50 × 381,063.48
  4. Step 4: Simplify right side
    667,377.32x = 351,014,909,816.34
  5. Step 5: Solve for x
    x = 351,014,909,816.34/667,377.32
  6. Step 6: Final answer
    x = 525,961.70

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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.