Home / 3,786.17-5,679.90-1,287.09

Finding the Fourth Proportional to 3,786.17, 5,679.90 and 1,287.09

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Solution

The fourth proportional to 3,786.17, 5,679.90 and 1,287.09 is: 1,930.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,786.17 : 5,679.90 = 1,287.09 : x
  2. Step 2: Convert to fraction form
    3,786.17/5,679.90 = 1,287.09/x
  3. Step 3: Cross multiply
    3,786.17x = 5,679.90 × 1,287.09
  4. Step 4: Simplify right side
    3,786.17x = 7,310,556.69
  5. Step 5: Solve for x
    x = 7,310,556.69/3,786.17
  6. Step 6: Final answer
    x = 1,930.86

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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.