Home / 2,811.96-4,211.60-1,640.21

Finding the Fourth Proportional to 2,811.96, 4,211.60 and 1,640.21

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Solution

The fourth proportional to 2,811.96, 4,211.60 and 1,640.21 is: 2,456.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.96 : 4,211.60 = 1,640.21 : x
  2. Step 2: Convert to fraction form
    2,811.96/4,211.60 = 1,640.21/x
  3. Step 3: Cross multiply
    2,811.96x = 4,211.60 × 1,640.21
  4. Step 4: Simplify right side
    2,811.96x = 6,907,908.44
  5. Step 5: Solve for x
    x = 6,907,908.44/2,811.96
  6. Step 6: Final answer
    x = 2,456.62

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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.