Home / 3,811.80-5,260.34-2,319.78

Finding the Fourth Proportional to 3,811.80, 5,260.34 and 2,319.78

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Solution

The fourth proportional to 3,811.80, 5,260.34 and 2,319.78 is: 3,201.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.80 : 5,260.34 = 2,319.78 : x
  2. Step 2: Convert to fraction form
    3,811.80/5,260.34 = 2,319.78/x
  3. Step 3: Cross multiply
    3,811.80x = 5,260.34 × 2,319.78
  4. Step 4: Simplify right side
    3,811.80x = 12,202,831.53
  5. Step 5: Solve for x
    x = 12,202,831.53/3,811.80
  6. Step 6: Final answer
    x = 3,201.33

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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.