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Finding the Fourth Proportional to 3,998.55, 5,517.99 and 2,230.20

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Solution

The fourth proportional to 3,998.55, 5,517.99 and 2,230.20 is: 3,077.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.55 : 5,517.99 = 2,230.20 : x
  2. Step 2: Convert to fraction form
    3,998.55/5,517.99 = 2,230.20/x
  3. Step 3: Cross multiply
    3,998.55x = 5,517.99 × 2,230.20
  4. Step 4: Simplify right side
    3,998.55x = 12,306,221.30
  5. Step 5: Solve for x
    x = 12,306,221.30/3,998.55
  6. Step 6: Final answer
    x = 3,077.67

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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.