Home / 3,986-5,978.19-1,519.95

Finding the Fourth Proportional to 3,986, 5,978.19 and 1,519.95

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Solution

The fourth proportional to 3,986, 5,978.19 and 1,519.95 is: 2,279.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986 : 5,978.19 = 1,519.95 : x
  2. Step 2: Convert to fraction form
    3,986/5,978.19 = 1,519.95/x
  3. Step 3: Cross multiply
    3,986x = 5,978.19 × 1,519.95
  4. Step 4: Simplify right side
    3,986x = 9,086,549.89
  5. Step 5: Solve for x
    x = 9,086,549.89/3,986
  6. Step 6: Final answer
    x = 2,279.62

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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.