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Finding the Third Proportional to 280 and 326

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Solution

The third proportional to 280 and 326 is: 379.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    280 : 326 = 326 : x
  2. Step 2: Convert to fraction form
    280/326 = 326/x
  3. Step 3: Cross multiply
    280x = 326 × 326
  4. Step 4: Simplify right side
    280x = 106,276
  5. Step 5: Solve for x
    x = 106,276/280
  6. Step 6: Final answer
    x = 379.56

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Why These Related Problems?

These problems maintain the same ratio (1.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.