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Finding the Third Proportional to 239.63 and 371.81

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Solution

The third proportional to 239.63 and 371.81 is: 576.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.63 : 371.81 = 371.81 : x
  2. Step 2: Convert to fraction form
    239.63/371.81 = 371.81/x
  3. Step 3: Cross multiply
    239.63x = 371.81 × 371.81
  4. Step 4: Simplify right side
    239.63x = 138,244.54
  5. Step 5: Solve for x
    x = 138,244.54/239.63
  6. Step 6: Final answer
    x = 576.92

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.