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Finding the Third Proportional to 694 and 1,157

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Solution

The third proportional to 694 and 1,157 is: 1,928.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    694 : 1,157 = 1,157 : x
  2. Step 2: Convert to fraction form
    694/1,157 = 1,157/x
  3. Step 3: Cross multiply
    694x = 1,157 × 1,157
  4. Step 4: Simplify right side
    694x = 1,338,649
  5. Step 5: Solve for x
    x = 1,338,649/694
  6. Step 6: Final answer
    x = 1,928.89

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.