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Finding the Fourth Proportional to 38.61, 57.42 and 38.25

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Solution

The fourth proportional to 38.61, 57.42 and 38.25 is: 56.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.61 : 57.42 = 38.25 : x
  2. Step 2: Convert to fraction form
    38.61/57.42 = 38.25/x
  3. Step 3: Cross multiply
    38.61x = 57.42 × 38.25
  4. Step 4: Simplify right side
    38.61x = 2,196.32
  5. Step 5: Solve for x
    x = 2,196.32/38.61
  6. Step 6: Final answer
    x = 56.88

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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.