Home / 2,861.88-3,949.98-1,620.12

Finding the Fourth Proportional to 2,861.88, 3,949.98 and 1,620.12

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Solution

The fourth proportional to 2,861.88, 3,949.98 and 1,620.12 is: 2,236.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.88 : 3,949.98 = 1,620.12 : x
  2. Step 2: Convert to fraction form
    2,861.88/3,949.98 = 1,620.12/x
  3. Step 3: Cross multiply
    2,861.88x = 3,949.98 × 1,620.12
  4. Step 4: Simplify right side
    2,861.88x = 6,399,441.60
  5. Step 5: Solve for x
    x = 6,399,441.60/2,861.88
  6. Step 6: Final answer
    x = 2,236.10

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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.