Home / 1,991.20-2,747.62-1,106.88

Finding the Fourth Proportional to 1,991.20, 2,747.62 and 1,106.88

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Solution

The fourth proportional to 1,991.20, 2,747.62 and 1,106.88 is: 1,527.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.20 : 2,747.62 = 1,106.88 : x
  2. Step 2: Convert to fraction form
    1,991.20/2,747.62 = 1,106.88/x
  3. Step 3: Cross multiply
    1,991.20x = 2,747.62 × 1,106.88
  4. Step 4: Simplify right side
    1,991.20x = 3,041,285.63
  5. Step 5: Solve for x
    x = 3,041,285.63/1,991.20
  6. Step 6: Final answer
    x = 1,527.36

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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.