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Finding the Third Proportional to 2.21 and 3.43

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Solution

The third proportional to 2.21 and 3.43 is: 5.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.21 : 3.43 = 3.43 : x
  2. Step 2: Convert to fraction form
    2.21/3.43 = 3.43/x
  3. Step 3: Cross multiply
    2.21x = 3.43 × 3.43
  4. Step 4: Simplify right side
    2.21x = 11.79
  5. Step 5: Solve for x
    x = 11.79/2.21
  6. Step 6: Final answer
    x = 5.32

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.