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Finding the Fourth Proportional to 3,489.73, 5,231.86 and 1,639.89

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Solution

The fourth proportional to 3,489.73, 5,231.86 and 1,639.89 is: 2,458.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.73 : 5,231.86 = 1,639.89 : x
  2. Step 2: Convert to fraction form
    3,489.73/5,231.86 = 1,639.89/x
  3. Step 3: Cross multiply
    3,489.73x = 5,231.86 × 1,639.89
  4. Step 4: Simplify right side
    3,489.73x = 8,579,674.90
  5. Step 5: Solve for x
    x = 8,579,674.90/3,489.73
  6. Step 6: Final answer
    x = 2,458.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.