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Finding the Third Proportional to 109.27 and 231.40

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Solution

The third proportional to 109.27 and 231.40 is: 490.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.27 : 231.40 = 231.40 : x
  2. Step 2: Convert to fraction form
    109.27/231.40 = 231.40/x
  3. Step 3: Cross multiply
    109.27x = 231.40 × 231.40
  4. Step 4: Simplify right side
    109.27x = 53,545.24
  5. Step 5: Solve for x
    x = 53,545.24/109.27
  6. Step 6: Final answer
    x = 490.05

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.