Home / 2,018.20-3,028.20-720.60

Finding the Fourth Proportional to 2,018.20, 3,028.20 and 720.60

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Solution

The fourth proportional to 2,018.20, 3,028.20 and 720.60 is: 1,081.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,018.20 : 3,028.20 = 720.60 : x
  2. Step 2: Convert to fraction form
    2,018.20/3,028.20 = 720.60/x
  3. Step 3: Cross multiply
    2,018.20x = 3,028.20 × 720.60
  4. Step 4: Simplify right side
    2,018.20x = 2,182,120.92
  5. Step 5: Solve for x
    x = 2,182,120.92/2,018.20
  6. Step 6: Final answer
    x = 1,081.22

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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.