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Finding the Fourth Proportional to 327.55, 451.33 and 287.91

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Solution

The fourth proportional to 327.55, 451.33 and 287.91 is: 396.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.55 : 451.33 = 287.91 : x
  2. Step 2: Convert to fraction form
    327.55/451.33 = 287.91/x
  3. Step 3: Cross multiply
    327.55x = 451.33 × 287.91
  4. Step 4: Simplify right side
    327.55x = 129,942.42
  5. Step 5: Solve for x
    x = 129,942.42/327.55
  6. Step 6: Final answer
    x = 396.71

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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.