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Finding the Third Proportional to 706 and 1,222

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Solution

The third proportional to 706 and 1,222 is: 2,115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    706 : 1,222 = 1,222 : x
  2. Step 2: Convert to fraction form
    706/1,222 = 1,222/x
  3. Step 3: Cross multiply
    706x = 1,222 × 1,222
  4. Step 4: Simplify right side
    706x = 1,493,284
  5. Step 5: Solve for x
    x = 1,493,284/706
  6. Step 6: Final answer
    x = 2,115.13

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Why These Related Problems?

These problems maintain the same ratio (1.73) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.