Home / 3,428.20-5,135.10-2,261.80

Finding the Fourth Proportional to 3,428.20, 5,135.10 and 2,261.80

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Solution

The fourth proportional to 3,428.20, 5,135.10 and 2,261.80 is: 3,387.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.20 : 5,135.10 = 2,261.80 : x
  2. Step 2: Convert to fraction form
    3,428.20/5,135.10 = 2,261.80/x
  3. Step 3: Cross multiply
    3,428.20x = 5,135.10 × 2,261.80
  4. Step 4: Simplify right side
    3,428.20x = 11,614,569.18
  5. Step 5: Solve for x
    x = 11,614,569.18/3,428.20
  6. Step 6: Final answer
    x = 3,387.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.