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Finding the Third Proportional to 5.72 and 12.28

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Solution

The third proportional to 5.72 and 12.28 is: 26.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.72 : 12.28 = 12.28 : x
  2. Step 2: Convert to fraction form
    5.72/12.28 = 12.28/x
  3. Step 3: Cross multiply
    5.72x = 12.28 × 12.28
  4. Step 4: Simplify right side
    5.72x = 150.83
  5. Step 5: Solve for x
    x = 150.83/5.72
  6. Step 6: Final answer
    x = 26.37

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.