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Finding the Fourth Proportional to 41.32, 57.07 and 38.78

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Solution

The fourth proportional to 41.32, 57.07 and 38.78 is: 53.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.32 : 57.07 = 38.78 : x
  2. Step 2: Convert to fraction form
    41.32/57.07 = 38.78/x
  3. Step 3: Cross multiply
    41.32x = 57.07 × 38.78
  4. Step 4: Simplify right side
    41.32x = 2,212.89
  5. Step 5: Solve for x
    x = 2,212.89/41.32
  6. Step 6: Final answer
    x = 53.55

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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.