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Finding the Third Proportional to 109.13 and 236.81

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Solution

The third proportional to 109.13 and 236.81 is: 513.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.13 : 236.81 = 236.81 : x
  2. Step 2: Convert to fraction form
    109.13/236.81 = 236.81/x
  3. Step 3: Cross multiply
    109.13x = 236.81 × 236.81
  4. Step 4: Simplify right side
    109.13x = 56,080.16
  5. Step 5: Solve for x
    x = 56,080.16/109.13
  6. Step 6: Final answer
    x = 513.91

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.