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Finding the Third Proportional to 156.09 and 331.17

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Solution

The third proportional to 156.09 and 331.17 is: 702.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.09 : 331.17 = 331.17 : x
  2. Step 2: Convert to fraction form
    156.09/331.17 = 331.17/x
  3. Step 3: Cross multiply
    156.09x = 331.17 × 331.17
  4. Step 4: Simplify right side
    156.09x = 109,674.81
  5. Step 5: Solve for x
    x = 109,674.81/156.09
  6. Step 6: Final answer
    x = 702.62

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.