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Finding the Fourth Proportional to 38.74, 57.80 and 37.82

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Solution

The fourth proportional to 38.74, 57.80 and 37.82 is: 56.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.74 : 57.80 = 37.82 : x
  2. Step 2: Convert to fraction form
    38.74/57.80 = 37.82/x
  3. Step 3: Cross multiply
    38.74x = 57.80 × 37.82
  4. Step 4: Simplify right side
    38.74x = 2,185.81
  5. Step 5: Solve for x
    x = 2,185.81/38.74
  6. Step 6: Final answer
    x = 56.43

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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.