Home / 3,979.68-5,965.92-1,639.56

Finding the Fourth Proportional to 3,979.68, 5,965.92 and 1,639.56

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Solution

The fourth proportional to 3,979.68, 5,965.92 and 1,639.56 is: 2,457.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.68 : 5,965.92 = 1,639.56 : x
  2. Step 2: Convert to fraction form
    3,979.68/5,965.92 = 1,639.56/x
  3. Step 3: Cross multiply
    3,979.68x = 5,965.92 × 1,639.56
  4. Step 4: Simplify right side
    3,979.68x = 9,781,483.80
  5. Step 5: Solve for x
    x = 9,781,483.80/3,979.68
  6. Step 6: Final answer
    x = 2,457.86

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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.