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Finding the Fourth Proportional to 327.39, 491.04 and 83.91

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Solution

The fourth proportional to 327.39, 491.04 and 83.91 is: 125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.39 : 491.04 = 83.91 : x
  2. Step 2: Convert to fraction form
    327.39/491.04 = 83.91/x
  3. Step 3: Cross multiply
    327.39x = 491.04 × 83.91
  4. Step 4: Simplify right side
    327.39x = 41,203.17
  5. Step 5: Solve for x
    x = 41,203.17/327.39
  6. Step 6: Final answer
    x = 125.85

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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.