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Finding the Fourth Proportional to 38.90, 57.97 and 36.77

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Solution

The fourth proportional to 38.90, 57.97 and 36.77 is: 54.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.90 : 57.97 = 36.77 : x
  2. Step 2: Convert to fraction form
    38.90/57.97 = 36.77/x
  3. Step 3: Cross multiply
    38.90x = 57.97 × 36.77
  4. Step 4: Simplify right side
    38.90x = 2,131.37
  5. Step 5: Solve for x
    x = 2,131.37/38.90
  6. Step 6: Final answer
    x = 54.79

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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.