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Finding the Third Proportional to 157.31 and 228.38

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Solution

The third proportional to 157.31 and 228.38 is: 331.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.31 : 228.38 = 228.38 : x
  2. Step 2: Convert to fraction form
    157.31/228.38 = 228.38/x
  3. Step 3: Cross multiply
    157.31x = 228.38 × 228.38
  4. Step 4: Simplify right side
    157.31x = 52,155.14
  5. Step 5: Solve for x
    x = 52,155.14/157.31
  6. Step 6: Final answer
    x = 331.54

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.