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Finding the Third Proportional to 3.09 and 4.08

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Solution

The third proportional to 3.09 and 4.08 is: 5.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.09 : 4.08 = 4.08 : x
  2. Step 2: Convert to fraction form
    3.09/4.08 = 4.08/x
  3. Step 3: Cross multiply
    3.09x = 4.08 × 4.08
  4. Step 4: Simplify right side
    3.09x = 16.63
  5. Step 5: Solve for x
    x = 16.63/3.09
  6. Step 6: Final answer
    x = 5.38

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.