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Finding the Third Proportional to 22.75 and 39.75

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Solution

The third proportional to 22.75 and 39.75 is: 69.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.75 : 39.75 = 39.75 : x
  2. Step 2: Convert to fraction form
    22.75/39.75 = 39.75/x
  3. Step 3: Cross multiply
    22.75x = 39.75 × 39.75
  4. Step 4: Simplify right side
    22.75x = 1,580.06
  5. Step 5: Solve for x
    x = 1,580.06/22.75
  6. Step 6: Final answer
    x = 69.45

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Why These Related Problems?

These problems maintain the same ratio (1.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.