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Finding the Third Proportional to 138.59 and 286.66

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Solution

The third proportional to 138.59 and 286.66 is: 592.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138.59 : 286.66 = 286.66 : x
  2. Step 2: Convert to fraction form
    138.59/286.66 = 286.66/x
  3. Step 3: Cross multiply
    138.59x = 286.66 × 286.66
  4. Step 4: Simplify right side
    138.59x = 82,176.28
  5. Step 5: Solve for x
    x = 82,176.28/138.59
  6. Step 6: Final answer
    x = 592.96

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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.