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Finding the Third Proportional to 5.16 and 7.96

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Solution

The third proportional to 5.16 and 7.96 is: 12.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.16 : 7.96 = 7.96 : x
  2. Step 2: Convert to fraction form
    5.16/7.96 = 7.96/x
  3. Step 3: Cross multiply
    5.16x = 7.96 × 7.96
  4. Step 4: Simplify right side
    5.16x = 63.31
  5. Step 5: Solve for x
    x = 63.31/5.16
  6. Step 6: Final answer
    x = 12.26

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.