Home / 1,998.24-2,757.83-1,440.55

Finding the Fourth Proportional to 1,998.24, 2,757.83 and 1,440.55

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Solution

The fourth proportional to 1,998.24, 2,757.83 and 1,440.55 is: 1,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.24 : 2,757.83 = 1,440.55 : x
  2. Step 2: Convert to fraction form
    1,998.24/2,757.83 = 1,440.55/x
  3. Step 3: Cross multiply
    1,998.24x = 2,757.83 × 1,440.55
  4. Step 4: Simplify right side
    1,998.24x = 3,972,784.80
  5. Step 5: Solve for x
    x = 3,972,784.80/1,998.24
  6. Step 6: Final answer
    x = 1,988.15

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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.