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Finding the Fourth Proportional to 667,474.44, 921,180.78 and 381,037.56

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Solution

The fourth proportional to 667,474.44, 921,180.78 and 381,037.56 is: 525,869.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,474.44 : 921,180.78 = 381,037.56 : x
  2. Step 2: Convert to fraction form
    667,474.44/921,180.78 = 381,037.56/x
  3. Step 3: Cross multiply
    667,474.44x = 921,180.78 × 381,037.56
  4. Step 4: Simplify right side
    667,474.44x = 351,004,476,730.10
  5. Step 5: Solve for x
    x = 351,004,476,730.10/667,474.44
  6. Step 6: Final answer
    x = 525,869.54

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1.5x scale

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.