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Finding the Fourth Proportional to 2,019.20, 3,028.92 and 786.20

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Solution

The fourth proportional to 2,019.20, 3,028.92 and 786.20 is: 1,179.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.20 : 3,028.92 = 786.20 : x
  2. Step 2: Convert to fraction form
    2,019.20/3,028.92 = 786.20/x
  3. Step 3: Cross multiply
    2,019.20x = 3,028.92 × 786.20
  4. Step 4: Simplify right side
    2,019.20x = 2,381,336.90
  5. Step 5: Solve for x
    x = 2,381,336.90/2,019.20
  6. Step 6: Final answer
    x = 1,179.35

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1.5x scale

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.