Home / 1,990.16-2,986.84-1,169.12

Finding the Fourth Proportional to 1,990.16, 2,986.84 and 1,169.12

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Solution

The fourth proportional to 1,990.16, 2,986.84 and 1,169.12 is: 1,754.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.16 : 2,986.84 = 1,169.12 : x
  2. Step 2: Convert to fraction form
    1,990.16/2,986.84 = 1,169.12/x
  3. Step 3: Cross multiply
    1,990.16x = 2,986.84 × 1,169.12
  4. Step 4: Simplify right side
    1,990.16x = 3,491,978.93
  5. Step 5: Solve for x
    x = 3,491,978.93/1,990.16
  6. Step 6: Final answer
    x = 1,754.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.