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Finding the Third Proportional to 156.94 and 329.06

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Solution

The third proportional to 156.94 and 329.06 is: 689.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.94 : 329.06 = 329.06 : x
  2. Step 2: Convert to fraction form
    156.94/329.06 = 329.06/x
  3. Step 3: Cross multiply
    156.94x = 329.06 × 329.06
  4. Step 4: Simplify right side
    156.94x = 108,282.13
  5. Step 5: Solve for x
    x = 108,282.13/156.94
  6. Step 6: Final answer
    x = 689.97

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.