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Finding the Third Proportional to 262.13 and 408.09

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Solution

The third proportional to 262.13 and 408.09 is: 635.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.13 : 408.09 = 408.09 : x
  2. Step 2: Convert to fraction form
    262.13/408.09 = 408.09/x
  3. Step 3: Cross multiply
    262.13x = 408.09 × 408.09
  4. Step 4: Simplify right side
    262.13x = 166,540.51
  5. Step 5: Solve for x
    x = 166,540.51/262.13
  6. Step 6: Final answer
    x = 635.35

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.