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Finding the Third Proportional to 2.81 and 5.81

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Solution

The third proportional to 2.81 and 5.81 is: 12.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.81 : 5.81 = 5.81 : x
  2. Step 2: Convert to fraction form
    2.81/5.81 = 5.81/x
  3. Step 3: Cross multiply
    2.81x = 5.81 × 5.81
  4. Step 4: Simplify right side
    2.81x = 33.79
  5. Step 5: Solve for x
    x = 33.79/2.81
  6. Step 6: Final answer
    x = 12.01

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.