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Finding the Fourth Proportional to 3,998.85, 5,518.17 and 2,230.43

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Solution

The fourth proportional to 3,998.85, 5,518.17 and 2,230.43 is: 3,077.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.85 : 5,518.17 = 2,230.43 : x
  2. Step 2: Convert to fraction form
    3,998.85/5,518.17 = 2,230.43/x
  3. Step 3: Cross multiply
    3,998.85x = 5,518.17 × 2,230.43
  4. Step 4: Simplify right side
    3,998.85x = 12,307,864.32
  5. Step 5: Solve for x
    x = 12,307,864.32/3,998.85
  6. Step 6: Final answer
    x = 3,077.85

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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.