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Finding the Third Proportional to 155 and 327

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Solution

The third proportional to 155 and 327 is: 689.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    155 : 327 = 327 : x
  2. Step 2: Convert to fraction form
    155/327 = 327/x
  3. Step 3: Cross multiply
    155x = 327 × 327
  4. Step 4: Simplify right side
    155x = 106,929
  5. Step 5: Solve for x
    x = 106,929/155
  6. Step 6: Final answer
    x = 689.86

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.