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Finding the Third Proportional to 161.38 and 243.63

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Solution

The third proportional to 161.38 and 243.63 is: 367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.38 : 243.63 = 243.63 : x
  2. Step 2: Convert to fraction form
    161.38/243.63 = 243.63/x
  3. Step 3: Cross multiply
    161.38x = 243.63 × 243.63
  4. Step 4: Simplify right side
    161.38x = 59,353.14
  5. Step 5: Solve for x
    x = 59,353.14/161.38
  6. Step 6: Final answer
    x = 367.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.