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Finding the Fourth Proportional to 38.14, 57.06 and 34.90

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Solution

The fourth proportional to 38.14, 57.06 and 34.90 is: 52.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.14 : 57.06 = 34.90 : x
  2. Step 2: Convert to fraction form
    38.14/57.06 = 34.90/x
  3. Step 3: Cross multiply
    38.14x = 57.06 × 34.90
  4. Step 4: Simplify right side
    38.14x = 1,991.39
  5. Step 5: Solve for x
    x = 1,991.39/38.14
  6. Step 6: Final answer
    x = 52.21

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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.