Home / 3,619.20-5,420.36-2,790.88

Finding the Fourth Proportional to 3,619.20, 5,420.36 and 2,790.88

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Solution

The fourth proportional to 3,619.20, 5,420.36 and 2,790.88 is: 4,179.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.20 : 5,420.36 = 2,790.88 : x
  2. Step 2: Convert to fraction form
    3,619.20/5,420.36 = 2,790.88/x
  3. Step 3: Cross multiply
    3,619.20x = 5,420.36 × 2,790.88
  4. Step 4: Simplify right side
    3,619.20x = 15,127,574.32
  5. Step 5: Solve for x
    x = 15,127,574.32/3,619.20
  6. Step 6: Final answer
    x = 4,179.81

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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.