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Finding the Fourth Proportional to 254.62, 381.95 and 69.55

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Solution

The fourth proportional to 254.62, 381.95 and 69.55 is: 104.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.62 : 381.95 = 69.55 : x
  2. Step 2: Convert to fraction form
    254.62/381.95 = 69.55/x
  3. Step 3: Cross multiply
    254.62x = 381.95 × 69.55
  4. Step 4: Simplify right side
    254.62x = 26,564.75
  5. Step 5: Solve for x
    x = 26,564.75/254.62
  6. Step 6: Final answer
    x = 104.33

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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.