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Finding the Third Proportional to 764 and 1,224

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Solution

The third proportional to 764 and 1,224 is: 1,960.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    764 : 1,224 = 1,224 : x
  2. Step 2: Convert to fraction form
    764/1,224 = 1,224/x
  3. Step 3: Cross multiply
    764x = 1,224 × 1,224
  4. Step 4: Simplify right side
    764x = 1,498,176
  5. Step 5: Solve for x
    x = 1,498,176/764
  6. Step 6: Final answer
    x = 1,960.96

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.