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Finding the Fourth Proportional to 40.44, 55.57 and 38.66

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Solution

The fourth proportional to 40.44, 55.57 and 38.66 is: 53.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.44 : 55.57 = 38.66 : x
  2. Step 2: Convert to fraction form
    40.44/55.57 = 38.66/x
  3. Step 3: Cross multiply
    40.44x = 55.57 × 38.66
  4. Step 4: Simplify right side
    40.44x = 2,147.96
  5. Step 5: Solve for x
    x = 2,147.96/40.44
  6. Step 6: Final answer
    x = 53.11

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.