Home / 4,119.80-6,179.70-3,390.20

Finding the Fourth Proportional to 4,119.80, 6,179.70 and 3,390.20

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Solution

The fourth proportional to 4,119.80, 6,179.70 and 3,390.20 is: 5,085.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,119.80 : 6,179.70 = 3,390.20 : x
  2. Step 2: Convert to fraction form
    4,119.80/6,179.70 = 3,390.20/x
  3. Step 3: Cross multiply
    4,119.80x = 6,179.70 × 3,390.20
  4. Step 4: Simplify right side
    4,119.80x = 20,950,418.94
  5. Step 5: Solve for x
    x = 20,950,418.94/4,119.80
  6. Step 6: Final answer
    x = 5,085.30

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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.