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Finding the Third Proportional to 30.56 and 66.44

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Solution

The third proportional to 30.56 and 66.44 is: 144.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.56 : 66.44 = 66.44 : x
  2. Step 2: Convert to fraction form
    30.56/66.44 = 66.44/x
  3. Step 3: Cross multiply
    30.56x = 66.44 × 66.44
  4. Step 4: Simplify right side
    30.56x = 4,413.94
  5. Step 5: Solve for x
    x = 4,413.94/30.56
  6. Step 6: Final answer
    x = 144.42

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.