Home / 1,991.25-2,747.85-1,107.03

Finding the Fourth Proportional to 1,991.25, 2,747.85 and 1,107.03

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Solution

The fourth proportional to 1,991.25, 2,747.85 and 1,107.03 is: 1,527.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.25 : 2,747.85 = 1,107.03 : x
  2. Step 2: Convert to fraction form
    1,991.25/2,747.85 = 1,107.03/x
  3. Step 3: Cross multiply
    1,991.25x = 2,747.85 × 1,107.03
  4. Step 4: Simplify right side
    1,991.25x = 3,041,952.39
  5. Step 5: Solve for x
    x = 3,041,952.39/1,991.25
  6. Step 6: Final answer
    x = 1,527.66

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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.