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Finding the Fourth Proportional to 38.39, 57.79 and 36.43

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Solution

The fourth proportional to 38.39, 57.79 and 36.43 is: 54.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.39 : 57.79 = 36.43 : x
  2. Step 2: Convert to fraction form
    38.39/57.79 = 36.43/x
  3. Step 3: Cross multiply
    38.39x = 57.79 × 36.43
  4. Step 4: Simplify right side
    38.39x = 2,105.29
  5. Step 5: Solve for x
    x = 2,105.29/38.39
  6. Step 6: Final answer
    x = 54.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.