Home / 3,679.80-5,511.60-2,578.20

Finding the Fourth Proportional to 3,679.80, 5,511.60 and 2,578.20

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Solution

The fourth proportional to 3,679.80, 5,511.60 and 2,578.20 is: 3,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.80 : 5,511.60 = 2,578.20 : x
  2. Step 2: Convert to fraction form
    3,679.80/5,511.60 = 2,578.20/x
  3. Step 3: Cross multiply
    3,679.80x = 5,511.60 × 2,578.20
  4. Step 4: Simplify right side
    3,679.80x = 14,210,007.12
  5. Step 5: Solve for x
    x = 14,210,007.12/3,679.80
  6. Step 6: Final answer
    x = 3,861.62

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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.