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Finding the Third Proportional to 764.25 and 1,119

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Solution

The third proportional to 764.25 and 1,119 is: 1,638.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    764.25 : 1,119 = 1,119 : x
  2. Step 2: Convert to fraction form
    764.25/1,119 = 1,119/x
  3. Step 3: Cross multiply
    764.25x = 1,119 × 1,119
  4. Step 4: Simplify right side
    764.25x = 1,252,161
  5. Step 5: Solve for x
    x = 1,252,161/764.25
  6. Step 6: Final answer
    x = 1,638.42

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.