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Finding the Third Proportional to 149.81 and 231.38

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Solution

The third proportional to 149.81 and 231.38 is: 357.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.81 : 231.38 = 231.38 : x
  2. Step 2: Convert to fraction form
    149.81/231.38 = 231.38/x
  3. Step 3: Cross multiply
    149.81x = 231.38 × 231.38
  4. Step 4: Simplify right side
    149.81x = 53,534.39
  5. Step 5: Solve for x
    x = 53,534.39/149.81
  6. Step 6: Final answer
    x = 357.34

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.