Home / 3,843.21-5,299.40-2,778.87

Finding the Fourth Proportional to 3,843.21, 5,299.40 and 2,778.87

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Solution

The fourth proportional to 3,843.21, 5,299.40 and 2,778.87 is: 3,831.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,843.21 : 5,299.40 = 2,778.87 : x
  2. Step 2: Convert to fraction form
    3,843.21/5,299.40 = 2,778.87/x
  3. Step 3: Cross multiply
    3,843.21x = 5,299.40 × 2,778.87
  4. Step 4: Simplify right side
    3,843.21x = 14,726,370.50
  5. Step 5: Solve for x
    x = 14,726,370.50/3,843.21
  6. Step 6: Final answer
    x = 3,831.79

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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.