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Finding the Third Proportional to 364 and 686

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Solution

The third proportional to 364 and 686 is: 1,292.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    364 : 686 = 686 : x
  2. Step 2: Convert to fraction form
    364/686 = 686/x
  3. Step 3: Cross multiply
    364x = 686 × 686
  4. Step 4: Simplify right side
    364x = 470,596
  5. Step 5: Solve for x
    x = 470,596/364
  6. Step 6: Final answer
    x = 1,292.85

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.