Home / 2,019.20-3,028.88-1,990.56

Finding the Fourth Proportional to 2,019.20, 3,028.88 and 1,990.56

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Solution

The fourth proportional to 2,019.20, 3,028.88 and 1,990.56 is: 2,985.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.20 : 3,028.88 = 1,990.56 : x
  2. Step 2: Convert to fraction form
    2,019.20/3,028.88 = 1,990.56/x
  3. Step 3: Cross multiply
    2,019.20x = 3,028.88 × 1,990.56
  4. Step 4: Simplify right side
    2,019.20x = 6,029,167.37
  5. Step 5: Solve for x
    x = 6,029,167.37/2,019.20
  6. Step 6: Final answer
    x = 2,985.92

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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.