Home / 1,990.71-2,747.25-1,106.60

Finding the Fourth Proportional to 1,990.71, 2,747.25 and 1,106.60

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Solution

The fourth proportional to 1,990.71, 2,747.25 and 1,106.60 is: 1,527.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.71 : 2,747.25 = 1,106.60 : x
  2. Step 2: Convert to fraction form
    1,990.71/2,747.25 = 1,106.60/x
  3. Step 3: Cross multiply
    1,990.71x = 2,747.25 × 1,106.60
  4. Step 4: Simplify right side
    1,990.71x = 3,040,093.11
  5. Step 5: Solve for x
    x = 3,040,093.11/1,990.71
  6. Step 6: Final answer
    x = 1,527.14

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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.