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Finding the Fourth Proportional to 667,796.64, 921,380.04 and 381,259.68

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Solution

The fourth proportional to 667,796.64, 921,380.04 and 381,259.68 is: 526,035.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,796.64 : 921,380.04 = 381,259.68 : x
  2. Step 2: Convert to fraction form
    667,796.64/921,380.04 = 381,259.68/x
  3. Step 3: Cross multiply
    667,796.64x = 921,380.04 × 381,259.68
  4. Step 4: Simplify right side
    667,796.64x = 351,285,059,208.79
  5. Step 5: Solve for x
    x = 351,285,059,208.79/667,796.64
  6. Step 6: Final answer
    x = 526,035.98

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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.