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Finding the Third Proportional to 2.81 and 4.03

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Solution

The third proportional to 2.81 and 4.03 is: 5.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.81 : 4.03 = 4.03 : x
  2. Step 2: Convert to fraction form
    2.81/4.03 = 4.03/x
  3. Step 3: Cross multiply
    2.81x = 4.03 × 4.03
  4. Step 4: Simplify right side
    2.81x = 16.25
  5. Step 5: Solve for x
    x = 16.25/2.81
  6. Step 6: Final answer
    x = 5.78

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.