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Finding the Fourth Proportional to 254.67, 381.87 and 132.81

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Solution

The fourth proportional to 254.67, 381.87 and 132.81 is: 199.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.67 : 381.87 = 132.81 : x
  2. Step 2: Convert to fraction form
    254.67/381.87 = 132.81/x
  3. Step 3: Cross multiply
    254.67x = 381.87 × 132.81
  4. Step 4: Simplify right side
    254.67x = 50,716.15
  5. Step 5: Solve for x
    x = 50,716.15/254.67
  6. Step 6: Final answer
    x = 199.14

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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.