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Finding the Third Proportional to 56.11 and 61.17

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Solution

The third proportional to 56.11 and 61.17 is: 66.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.11 : 61.17 = 61.17 : x
  2. Step 2: Convert to fraction form
    56.11/61.17 = 61.17/x
  3. Step 3: Cross multiply
    56.11x = 61.17 × 61.17
  4. Step 4: Simplify right side
    56.11x = 3,742.00
  5. Step 5: Solve for x
    x = 3,742.00/56.11
  6. Step 6: Final answer
    x = 66.69

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.