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Finding the Fourth Proportional to 254.38, 381.32 and 100.25

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Solution

The fourth proportional to 254.38, 381.32 and 100.25 is: 150.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.38 : 381.32 = 100.25 : x
  2. Step 2: Convert to fraction form
    254.38/381.32 = 100.25/x
  3. Step 3: Cross multiply
    254.38x = 381.32 × 100.25
  4. Step 4: Simplify right side
    254.38x = 38,226.73
  5. Step 5: Solve for x
    x = 38,226.73/254.38
  6. Step 6: Final answer
    x = 150.27

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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.