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Finding the Third Proportional to 1,678 and 3,686

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Solution

The third proportional to 1,678 and 3,686 is: 8,096.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678 : 3,686 = 3,686 : x
  2. Step 2: Convert to fraction form
    1,678/3,686 = 3,686/x
  3. Step 3: Cross multiply
    1,678x = 3,686 × 3,686
  4. Step 4: Simplify right side
    1,678x = 13,586,596
  5. Step 5: Solve for x
    x = 13,586,596/1,678
  6. Step 6: Final answer
    x = 8,096.90

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.