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Finding the Fourth Proportional to 327.27, 490.91 and 261.97

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Solution

The fourth proportional to 327.27, 490.91 and 261.97 is: 392.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.27 : 490.91 = 261.97 : x
  2. Step 2: Convert to fraction form
    327.27/490.91 = 261.97/x
  3. Step 3: Cross multiply
    327.27x = 490.91 × 261.97
  4. Step 4: Simplify right side
    327.27x = 128,601.34
  5. Step 5: Solve for x
    x = 128,601.34/327.27
  6. Step 6: Final answer
    x = 392.95

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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.