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Finding the Third Proportional to 80.75 and 145

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Solution

The third proportional to 80.75 and 145 is: 260.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.75 : 145 = 145 : x
  2. Step 2: Convert to fraction form
    80.75/145 = 145/x
  3. Step 3: Cross multiply
    80.75x = 145 × 145
  4. Step 4: Simplify right side
    80.75x = 21,025
  5. Step 5: Solve for x
    x = 21,025/80.75
  6. Step 6: Final answer
    x = 260.37

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Why These Related Problems?

These problems maintain the same ratio (1.80) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.