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Finding the Third Proportional to 38.74 and 84.40

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Solution

The third proportional to 38.74 and 84.40 is: 183.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.74 : 84.40 = 84.40 : x
  2. Step 2: Convert to fraction form
    38.74/84.40 = 84.40/x
  3. Step 3: Cross multiply
    38.74x = 84.40 × 84.40
  4. Step 4: Simplify right side
    38.74x = 7,122.55
  5. Step 5: Solve for x
    x = 7,122.55/38.74
  6. Step 6: Final answer
    x = 183.84

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.