Home / 1,991.44-2,747.80-1,107.08

Finding the Fourth Proportional to 1,991.44, 2,747.80 and 1,107.08

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Solution

The fourth proportional to 1,991.44, 2,747.80 and 1,107.08 is: 1,527.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.44 : 2,747.80 = 1,107.08 : x
  2. Step 2: Convert to fraction form
    1,991.44/2,747.80 = 1,107.08/x
  3. Step 3: Cross multiply
    1,991.44x = 2,747.80 × 1,107.08
  4. Step 4: Simplify right side
    1,991.44x = 3,042,034.42
  5. Step 5: Solve for x
    x = 3,042,034.42/1,991.44
  6. Step 6: Final answer
    x = 1,527.56

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1.5x scale

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.