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Finding the Fourth Proportional to 254.64, 381.68 and 163.38

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Solution

The fourth proportional to 254.64, 381.68 and 163.38 is: 244.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.64 : 381.68 = 163.38 : x
  2. Step 2: Convert to fraction form
    254.64/381.68 = 163.38/x
  3. Step 3: Cross multiply
    254.64x = 381.68 × 163.38
  4. Step 4: Simplify right side
    254.64x = 62,360.11
  5. Step 5: Solve for x
    x = 62,360.11/254.64
  6. Step 6: Final answer
    x = 244.89

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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.