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Finding the Third Proportional to 136.27 and 288.70

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Solution

The third proportional to 136.27 and 288.70 is: 611.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.27 : 288.70 = 288.70 : x
  2. Step 2: Convert to fraction form
    136.27/288.70 = 288.70/x
  3. Step 3: Cross multiply
    136.27x = 288.70 × 288.70
  4. Step 4: Simplify right side
    136.27x = 83,349.49
  5. Step 5: Solve for x
    x = 83,349.49/136.27
  6. Step 6: Final answer
    x = 611.67

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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.