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Finding the Third Proportional to 258 and 296

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Solution

The third proportional to 258 and 296 is: 339.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258 : 296 = 296 : x
  2. Step 2: Convert to fraction form
    258/296 = 296/x
  3. Step 3: Cross multiply
    258x = 296 × 296
  4. Step 4: Simplify right side
    258x = 87,616
  5. Step 5: Solve for x
    x = 87,616/258
  6. Step 6: Final answer
    x = 339.60

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.