Home / 2,640.12-3,956.94-1,912.20

Finding the Fourth Proportional to 2,640.12, 3,956.94 and 1,912.20

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Solution

The fourth proportional to 2,640.12, 3,956.94 and 1,912.20 is: 2,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.12 : 3,956.94 = 1,912.20 : x
  2. Step 2: Convert to fraction form
    2,640.12/3,956.94 = 1,912.20/x
  3. Step 3: Cross multiply
    2,640.12x = 3,956.94 × 1,912.20
  4. Step 4: Simplify right side
    2,640.12x = 7,566,460.67
  5. Step 5: Solve for x
    x = 7,566,460.67/2,640.12
  6. Step 6: Final answer
    x = 2,865.95

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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.