Home / 1,991.30-2,747.97-1,107.09

Finding the Fourth Proportional to 1,991.30, 2,747.97 and 1,107.09

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Solution

The fourth proportional to 1,991.30, 2,747.97 and 1,107.09 is: 1,527.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.30 : 2,747.97 = 1,107.09 : x
  2. Step 2: Convert to fraction form
    1,991.30/2,747.97 = 1,107.09/x
  3. Step 3: Cross multiply
    1,991.30x = 2,747.97 × 1,107.09
  4. Step 4: Simplify right side
    1,991.30x = 3,042,250.11
  5. Step 5: Solve for x
    x = 3,042,250.11/1,991.30
  6. Step 6: Final answer
    x = 1,527.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.