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Finding the Third Proportional to 2.05 and 3.12

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Solution

The third proportional to 2.05 and 3.12 is: 4.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.05 : 3.12 = 3.12 : x
  2. Step 2: Convert to fraction form
    2.05/3.12 = 3.12/x
  3. Step 3: Cross multiply
    2.05x = 3.12 × 3.12
  4. Step 4: Simplify right side
    2.05x = 9.75
  5. Step 5: Solve for x
    x = 9.75/2.05
  6. Step 6: Final answer
    x = 4.76

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.