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Finding the Third Proportional to 136.05 and 321.05

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Solution

The third proportional to 136.05 and 321.05 is: 757.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.05 : 321.05 = 321.05 : x
  2. Step 2: Convert to fraction form
    136.05/321.05 = 321.05/x
  3. Step 3: Cross multiply
    136.05x = 321.05 × 321.05
  4. Step 4: Simplify right side
    136.05x = 103,071.10
  5. Step 5: Solve for x
    x = 103,071.10/136.05
  6. Step 6: Final answer
    x = 757.57

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.