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Finding the Third Proportional to 215 and 295

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Solution

The third proportional to 215 and 295 is: 404.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    215 : 295 = 295 : x
  2. Step 2: Convert to fraction form
    215/295 = 295/x
  3. Step 3: Cross multiply
    215x = 295 × 295
  4. Step 4: Simplify right side
    215x = 87,025
  5. Step 5: Solve for x
    x = 87,025/215
  6. Step 6: Final answer
    x = 404.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.