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Finding the Fourth Proportional to 38.27, 56.90 and 36.72

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Solution

The fourth proportional to 38.27, 56.90 and 36.72 is: 54.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.27 : 56.90 = 36.72 : x
  2. Step 2: Convert to fraction form
    38.27/56.90 = 36.72/x
  3. Step 3: Cross multiply
    38.27x = 56.90 × 36.72
  4. Step 4: Simplify right side
    38.27x = 2,089.46
  5. Step 5: Solve for x
    x = 2,089.46/38.27
  6. Step 6: Final answer
    x = 54.59

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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.