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Finding the Third Proportional to 18.44 and 40.38

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Solution

The third proportional to 18.44 and 40.38 is: 88.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.44 : 40.38 = 40.38 : x
  2. Step 2: Convert to fraction form
    18.44/40.38 = 40.38/x
  3. Step 3: Cross multiply
    18.44x = 40.38 × 40.38
  4. Step 4: Simplify right side
    18.44x = 1,630.65
  5. Step 5: Solve for x
    x = 1,630.65/18.44
  6. Step 6: Final answer
    x = 88.43

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.