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Finding the Third Proportional to 1,990.13 and 2,799

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Solution

The third proportional to 1,990.13 and 2,799 is: 3,936.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.13 : 2,799 = 2,799 : x
  2. Step 2: Convert to fraction form
    1,990.13/2,799 = 2,799/x
  3. Step 3: Cross multiply
    1,990.13x = 2,799 × 2,799
  4. Step 4: Simplify right side
    1,990.13x = 7,834,401
  5. Step 5: Solve for x
    x = 7,834,401/1,990.13
  6. Step 6: Final answer
    x = 3,936.64

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.