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Finding the Third Proportional to 157.25 and 329.50

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Solution

The third proportional to 157.25 and 329.50 is: 690.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.25 : 329.50 = 329.50 : x
  2. Step 2: Convert to fraction form
    157.25/329.50 = 329.50/x
  3. Step 3: Cross multiply
    157.25x = 329.50 × 329.50
  4. Step 4: Simplify right side
    157.25x = 108,570.25
  5. Step 5: Solve for x
    x = 108,570.25/157.25
  6. Step 6: Final answer
    x = 690.43

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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.