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Finding the Fourth Proportional to 38.75, 57.72 and 36.83

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Solution

The fourth proportional to 38.75, 57.72 and 36.83 is: 54.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.75 : 57.72 = 36.83 : x
  2. Step 2: Convert to fraction form
    38.75/57.72 = 36.83/x
  3. Step 3: Cross multiply
    38.75x = 57.72 × 36.83
  4. Step 4: Simplify right side
    38.75x = 2,125.35
  5. Step 5: Solve for x
    x = 2,125.35/38.75
  6. Step 6: Final answer
    x = 54.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.