Home / 1,998.25-2,757.60-1,089.76

Finding the Fourth Proportional to 1,998.25, 2,757.60 and 1,089.76

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Solution

The fourth proportional to 1,998.25, 2,757.60 and 1,089.76 is: 1,503.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.25 : 2,757.60 = 1,089.76 : x
  2. Step 2: Convert to fraction form
    1,998.25/2,757.60 = 1,089.76/x
  3. Step 3: Cross multiply
    1,998.25x = 2,757.60 × 1,089.76
  4. Step 4: Simplify right side
    1,998.25x = 3,005,112.56
  5. Step 5: Solve for x
    x = 3,005,112.56/1,998.25
  6. Step 6: Final answer
    x = 1,503.87

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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.