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Finding the Third Proportional to 135.58 and 280.81

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Solution

The third proportional to 135.58 and 280.81 is: 581.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.58 : 280.81 = 280.81 : x
  2. Step 2: Convert to fraction form
    135.58/280.81 = 280.81/x
  3. Step 3: Cross multiply
    135.58x = 280.81 × 280.81
  4. Step 4: Simplify right side
    135.58x = 78,854.56
  5. Step 5: Solve for x
    x = 78,854.56/135.58
  6. Step 6: Final answer
    x = 581.61

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.