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Finding the Fourth Proportional to 3,998.66, 5,518.33 and 2,230.43

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Solution

The fourth proportional to 3,998.66, 5,518.33 and 2,230.43 is: 3,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.66 : 5,518.33 = 2,230.43 : x
  2. Step 2: Convert to fraction form
    3,998.66/5,518.33 = 2,230.43/x
  3. Step 3: Cross multiply
    3,998.66x = 5,518.33 × 2,230.43
  4. Step 4: Simplify right side
    3,998.66x = 12,308,215.61
  5. Step 5: Solve for x
    x = 12,308,215.61/3,998.66
  6. Step 6: Final answer
    x = 3,078.09

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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.