Home / 2,790.78-4,184.88-2,571.92

Finding the Fourth Proportional to 2,790.78, 4,184.88 and 2,571.92

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Solution

The fourth proportional to 2,790.78, 4,184.88 and 2,571.92 is: 3,856.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.78 : 4,184.88 = 2,571.92 : x
  2. Step 2: Convert to fraction form
    2,790.78/4,184.88 = 2,571.92/x
  3. Step 3: Cross multiply
    2,790.78x = 4,184.88 × 2,571.92
  4. Step 4: Simplify right side
    2,790.78x = 10,763,155.65
  5. Step 5: Solve for x
    x = 10,763,155.65/2,790.78
  6. Step 6: Final answer
    x = 3,856.68

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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.