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Finding the Third Proportional to 5.61 and 7.98

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Solution

The third proportional to 5.61 and 7.98 is: 11.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.61 : 7.98 = 7.98 : x
  2. Step 2: Convert to fraction form
    5.61/7.98 = 7.98/x
  3. Step 3: Cross multiply
    5.61x = 7.98 × 7.98
  4. Step 4: Simplify right side
    5.61x = 63.72
  5. Step 5: Solve for x
    x = 63.72/5.61
  6. Step 6: Final answer
    x = 11.36

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.