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Finding the Third Proportional to 1,994.50 and 2,855

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Solution

The third proportional to 1,994.50 and 2,855 is: 4,086.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.50 : 2,855 = 2,855 : x
  2. Step 2: Convert to fraction form
    1,994.50/2,855 = 2,855/x
  3. Step 3: Cross multiply
    1,994.50x = 2,855 × 2,855
  4. Step 4: Simplify right side
    1,994.50x = 8,151,025
  5. Step 5: Solve for x
    x = 8,151,025/1,994.50
  6. Step 6: Final answer
    x = 4,086.75

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.