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Finding the Third Proportional to 30.25 and 65.25

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Solution

The third proportional to 30.25 and 65.25 is: 140.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30.25 : 65.25 = 65.25 : x
  2. Step 2: Convert to fraction form
    30.25/65.25 = 65.25/x
  3. Step 3: Cross multiply
    30.25x = 65.25 × 65.25
  4. Step 4: Simplify right side
    30.25x = 4,257.56
  5. Step 5: Solve for x
    x = 4,257.56/30.25
  6. Step 6: Final answer
    x = 140.75

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.