Home / 1,990.74-2,747.19-1,106.55

Finding the Fourth Proportional to 1,990.74, 2,747.19 and 1,106.55

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Solution

The fourth proportional to 1,990.74, 2,747.19 and 1,106.55 is: 1,527.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.74 : 2,747.19 = 1,106.55 : x
  2. Step 2: Convert to fraction form
    1,990.74/2,747.19 = 1,106.55/x
  3. Step 3: Cross multiply
    1,990.74x = 2,747.19 × 1,106.55
  4. Step 4: Simplify right side
    1,990.74x = 3,039,903.09
  5. Step 5: Solve for x
    x = 3,039,903.09/1,990.74
  6. Step 6: Final answer
    x = 1,527.02

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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.