Home / 2,800.20-3,864.78-1,621.92

Finding the Fourth Proportional to 2,800.20, 3,864.78 and 1,621.92

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Solution

The fourth proportional to 2,800.20, 3,864.78 and 1,621.92 is: 2,238.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.20 : 3,864.78 = 1,621.92 : x
  2. Step 2: Convert to fraction form
    2,800.20/3,864.78 = 1,621.92/x
  3. Step 3: Cross multiply
    2,800.20x = 3,864.78 × 1,621.92
  4. Step 4: Simplify right side
    2,800.20x = 6,268,363.98
  5. Step 5: Solve for x
    x = 6,268,363.98/2,800.20
  6. Step 6: Final answer
    x = 2,238.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.