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Finding the Third Proportional to 269.44 and 405.28

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Solution

The third proportional to 269.44 and 405.28 is: 609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.44 : 405.28 = 405.28 : x
  2. Step 2: Convert to fraction form
    269.44/405.28 = 405.28/x
  3. Step 3: Cross multiply
    269.44x = 405.28 × 405.28
  4. Step 4: Simplify right side
    269.44x = 164,252.89
  5. Step 5: Solve for x
    x = 164,252.89/269.44
  6. Step 6: Final answer
    x = 609.61

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.