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Finding the Fourth Proportional to 38.28, 52.74 and 36.72

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Solution

The fourth proportional to 38.28, 52.74 and 36.72 is: 50.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.28 : 52.74 = 36.72 : x
  2. Step 2: Convert to fraction form
    38.28/52.74 = 36.72/x
  3. Step 3: Cross multiply
    38.28x = 52.74 × 36.72
  4. Step 4: Simplify right side
    38.28x = 1,936.61
  5. Step 5: Solve for x
    x = 1,936.61/38.28
  6. Step 6: Final answer
    x = 50.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.