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Finding the Fourth Proportional to 3,998.94, 5,518.31 and 2,230.53

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Solution

The fourth proportional to 3,998.94, 5,518.31 and 2,230.53 is: 3,078.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.94 : 5,518.31 = 2,230.53 : x
  2. Step 2: Convert to fraction form
    3,998.94/5,518.31 = 2,230.53/x
  3. Step 3: Cross multiply
    3,998.94x = 5,518.31 × 2,230.53
  4. Step 4: Simplify right side
    3,998.94x = 12,308,744.85
  5. Step 5: Solve for x
    x = 12,308,744.85/3,998.94
  6. Step 6: Final answer
    x = 3,078.00

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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.