Home / 3,979.21-5,491.09-2,300.69

Finding the Fourth Proportional to 3,979.21, 5,491.09 and 2,300.69

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Solution

The fourth proportional to 3,979.21, 5,491.09 and 2,300.69 is: 3,174.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.21 : 5,491.09 = 2,300.69 : x
  2. Step 2: Convert to fraction form
    3,979.21/5,491.09 = 2,300.69/x
  3. Step 3: Cross multiply
    3,979.21x = 5,491.09 × 2,300.69
  4. Step 4: Simplify right side
    3,979.21x = 12,633,295.85
  5. Step 5: Solve for x
    x = 12,633,295.85/3,979.21
  6. Step 6: Final answer
    x = 3,174.83

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1.5x scale

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.