Home / 2,800.86-3,865.41-1,621.95

Finding the Fourth Proportional to 2,800.86, 3,865.41 and 1,621.95

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Solution

The fourth proportional to 2,800.86, 3,865.41 and 1,621.95 is: 2,238.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.86 : 3,865.41 = 1,621.95 : x
  2. Step 2: Convert to fraction form
    2,800.86/3,865.41 = 1,621.95/x
  3. Step 3: Cross multiply
    2,800.86x = 3,865.41 × 1,621.95
  4. Step 4: Simplify right side
    2,800.86x = 6,269,501.75
  5. Step 5: Solve for x
    x = 6,269,501.75/2,800.86
  6. Step 6: Final answer
    x = 2,238.42

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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.