Home / 2,811.88-3,880.06-1,692.80

Finding the Fourth Proportional to 2,811.88, 3,880.06 and 1,692.80

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Solution

The fourth proportional to 2,811.88, 3,880.06 and 1,692.80 is: 2,335.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.88 : 3,880.06 = 1,692.80 : x
  2. Step 2: Convert to fraction form
    2,811.88/3,880.06 = 1,692.80/x
  3. Step 3: Cross multiply
    2,811.88x = 3,880.06 × 1,692.80
  4. Step 4: Simplify right side
    2,811.88x = 6,568,165.57
  5. Step 5: Solve for x
    x = 6,568,165.57/2,811.88
  6. Step 6: Final answer
    x = 2,335.86

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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.