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Finding the Fourth Proportional to 43.78, 60.31 and 38.22

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Solution

The fourth proportional to 43.78, 60.31 and 38.22 is: 52.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.78 : 60.31 = 38.22 : x
  2. Step 2: Convert to fraction form
    43.78/60.31 = 38.22/x
  3. Step 3: Cross multiply
    43.78x = 60.31 × 38.22
  4. Step 4: Simplify right side
    43.78x = 2,305.05
  5. Step 5: Solve for x
    x = 2,305.05/43.78
  6. Step 6: Final answer
    x = 52.65

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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.