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Finding the Fourth Proportional to 3,998.68, 5,518.49 and 2,206.52

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Solution

The fourth proportional to 3,998.68, 5,518.49 and 2,206.52 is: 3,045.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.68 : 5,518.49 = 2,206.52 : x
  2. Step 2: Convert to fraction form
    3,998.68/5,518.49 = 2,206.52/x
  3. Step 3: Cross multiply
    3,998.68x = 5,518.49 × 2,206.52
  4. Step 4: Simplify right side
    3,998.68x = 12,176,646.83
  5. Step 5: Solve for x
    x = 12,176,646.83/3,998.68
  6. Step 6: Final answer
    x = 3,045.17

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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.