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Finding the Fourth Proportional to 667,797.64, 921,381.42 and 381,260.68

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Solution

The fourth proportional to 667,797.64, 921,381.42 and 381,260.68 is: 526,037.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,797.64 : 921,381.42 = 381,260.68 : x
  2. Step 2: Convert to fraction form
    667,797.64/921,381.42 = 381,260.68/x
  3. Step 3: Cross multiply
    667,797.64x = 921,381.42 × 381,260.68
  4. Step 4: Simplify right side
    667,797.64x = 351,286,506,728.57
  5. Step 5: Solve for x
    x = 351,286,506,728.57/667,797.64
  6. Step 6: Final answer
    x = 526,037.36

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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.