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Finding the Third Proportional to 791.75 and 1,229

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Solution

The third proportional to 791.75 and 1,229 is: 1,907.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    791.75 : 1,229 = 1,229 : x
  2. Step 2: Convert to fraction form
    791.75/1,229 = 1,229/x
  3. Step 3: Cross multiply
    791.75x = 1,229 × 1,229
  4. Step 4: Simplify right side
    791.75x = 1,510,441
  5. Step 5: Solve for x
    x = 1,510,441/791.75
  6. Step 6: Final answer
    x = 1,907.72

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.