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Finding the Fourth Proportional to 327.72, 451.56 and 261.96

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Solution

The fourth proportional to 327.72, 451.56 and 261.96 is: 360.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.72 : 451.56 = 261.96 : x
  2. Step 2: Convert to fraction form
    327.72/451.56 = 261.96/x
  3. Step 3: Cross multiply
    327.72x = 451.56 × 261.96
  4. Step 4: Simplify right side
    327.72x = 118,290.66
  5. Step 5: Solve for x
    x = 118,290.66/327.72
  6. Step 6: Final answer
    x = 360.95

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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.