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Finding the Third Proportional to 3.43 and 7.89

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Solution

The third proportional to 3.43 and 7.89 is: 18.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.43 : 7.89 = 7.89 : x
  2. Step 2: Convert to fraction form
    3.43/7.89 = 7.89/x
  3. Step 3: Cross multiply
    3.43x = 7.89 × 7.89
  4. Step 4: Simplify right side
    3.43x = 62.31
  5. Step 5: Solve for x
    x = 62.31/3.43
  6. Step 6: Final answer
    x = 18.16

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.