Home / 2,721.45-4,081.20-1,403.80

Finding the Fourth Proportional to 2,721.45, 4,081.20 and 1,403.80

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Solution

The fourth proportional to 2,721.45, 4,081.20 and 1,403.80 is: 2,105.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.45 : 4,081.20 = 1,403.80 : x
  2. Step 2: Convert to fraction form
    2,721.45/4,081.20 = 1,403.80/x
  3. Step 3: Cross multiply
    2,721.45x = 4,081.20 × 1,403.80
  4. Step 4: Simplify right side
    2,721.45x = 5,729,188.56
  5. Step 5: Solve for x
    x = 5,729,188.56/2,721.45
  6. Step 6: Final answer
    x = 2,105.20

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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.