Home / 3,480.91-5,220.05-1,400.21

Finding the Fourth Proportional to 3,480.91, 5,220.05 and 1,400.21

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Solution

The fourth proportional to 3,480.91, 5,220.05 and 1,400.21 is: 2,099.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.91 : 5,220.05 = 1,400.21 : x
  2. Step 2: Convert to fraction form
    3,480.91/5,220.05 = 1,400.21/x
  3. Step 3: Cross multiply
    3,480.91x = 5,220.05 × 1,400.21
  4. Step 4: Simplify right side
    3,480.91x = 7,309,143.61
  5. Step 5: Solve for x
    x = 7,309,143.61/3,480.91
  6. Step 6: Final answer
    x = 2,099.78

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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.