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Finding the Third Proportional to 694 and 1,322

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Solution

The third proportional to 694 and 1,322 is: 2,518.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    694 : 1,322 = 1,322 : x
  2. Step 2: Convert to fraction form
    694/1,322 = 1,322/x
  3. Step 3: Cross multiply
    694x = 1,322 × 1,322
  4. Step 4: Simplify right side
    694x = 1,747,684
  5. Step 5: Solve for x
    x = 1,747,684/694
  6. Step 6: Final answer
    x = 2,518.28

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.