Home / 3,378.80-4,661.99-1,961.68

Finding the Fourth Proportional to 3,378.80, 4,661.99 and 1,961.68

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Solution

The fourth proportional to 3,378.80, 4,661.99 and 1,961.68 is: 2,706.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.80 : 4,661.99 = 1,961.68 : x
  2. Step 2: Convert to fraction form
    3,378.80/4,661.99 = 1,961.68/x
  3. Step 3: Cross multiply
    3,378.80x = 4,661.99 × 1,961.68
  4. Step 4: Simplify right side
    3,378.80x = 9,145,332.54
  5. Step 5: Solve for x
    x = 9,145,332.54/3,378.80
  6. Step 6: Final answer
    x = 2,706.68

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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.