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Finding the Third Proportional to 2.89 and 3.76

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Solution

The third proportional to 2.89 and 3.76 is: 4.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.89 : 3.76 = 3.76 : x
  2. Step 2: Convert to fraction form
    2.89/3.76 = 3.76/x
  3. Step 3: Cross multiply
    2.89x = 3.76 × 3.76
  4. Step 4: Simplify right side
    2.89x = 14.15
  5. Step 5: Solve for x
    x = 14.15/2.89
  6. Step 6: Final answer
    x = 4.89

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.