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Finding the Third Proportional to 157 and 197.25

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Solution

The third proportional to 157 and 197.25 is: 247.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    157 : 197.25 = 197.25 : x
  2. Step 2: Convert to fraction form
    157/197.25 = 197.25/x
  3. Step 3: Cross multiply
    157x = 197.25 × 197.25
  4. Step 4: Simplify right side
    157x = 38,907.56
  5. Step 5: Solve for x
    x = 38,907.56/157
  6. Step 6: Final answer
    x = 247.82

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Why These Related Problems?

These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.