Home / 2,019.38-3,029.13-720.81

Finding the Fourth Proportional to 2,019.38, 3,029.13 and 720.81

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Solution

The fourth proportional to 2,019.38, 3,029.13 and 720.81 is: 1,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.38 : 3,029.13 = 720.81 : x
  2. Step 2: Convert to fraction form
    2,019.38/3,029.13 = 720.81/x
  3. Step 3: Cross multiply
    2,019.38x = 3,029.13 × 720.81
  4. Step 4: Simplify right side
    2,019.38x = 2,183,427.20
  5. Step 5: Solve for x
    x = 2,183,427.20/2,019.38
  6. Step 6: Final answer
    x = 1,081.24

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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.