Home / 3,621.20-5,435.76-2,809.28

Finding the Fourth Proportional to 3,621.20, 5,435.76 and 2,809.28

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Solution

The fourth proportional to 3,621.20, 5,435.76 and 2,809.28 is: 4,216.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,621.20 : 5,435.76 = 2,809.28 : x
  2. Step 2: Convert to fraction form
    3,621.20/5,435.76 = 2,809.28/x
  3. Step 3: Cross multiply
    3,621.20x = 5,435.76 × 2,809.28
  4. Step 4: Simplify right side
    3,621.20x = 15,270,571.85
  5. Step 5: Solve for x
    x = 15,270,571.85/3,621.20
  6. Step 6: Final answer
    x = 4,216.99

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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.