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Finding the Fourth Proportional to 327,489.36, 491,251.32 and 105,890.64

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Solution

The fourth proportional to 327,489.36, 491,251.32 and 105,890.64 is: 158,841.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,489.36 : 491,251.32 = 105,890.64 : x
  2. Step 2: Convert to fraction form
    327,489.36/491,251.32 = 105,890.64/x
  3. Step 3: Cross multiply
    327,489.36x = 491,251.32 × 105,890.64
  4. Step 4: Simplify right side
    327,489.36x = 52,018,916,675.64
  5. Step 5: Solve for x
    x = 52,018,916,675.64/327,489.36
  6. Step 6: Final answer
    x = 158,841.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.