Home / 2,880.12-4,311.90-1,999.80

Finding the Fourth Proportional to 2,880.12, 4,311.90 and 1,999.80

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Solution

The fourth proportional to 2,880.12, 4,311.90 and 1,999.80 is: 2,993.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.12 : 4,311.90 = 1,999.80 : x
  2. Step 2: Convert to fraction form
    2,880.12/4,311.90 = 1,999.80/x
  3. Step 3: Cross multiply
    2,880.12x = 4,311.90 × 1,999.80
  4. Step 4: Simplify right side
    2,880.12x = 8,622,937.62
  5. Step 5: Solve for x
    x = 8,622,937.62/2,880.12
  6. Step 6: Final answer
    x = 2,993.95

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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.