Home / 3,979.79-5,981.66-3,290.87

Finding the Fourth Proportional to 3,979.79, 5,981.66 and 3,290.87

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Solution

The fourth proportional to 3,979.79, 5,981.66 and 3,290.87 is: 4,946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.79 : 5,981.66 = 3,290.87 : x
  2. Step 2: Convert to fraction form
    3,979.79/5,981.66 = 3,290.87/x
  3. Step 3: Cross multiply
    3,979.79x = 5,981.66 × 3,290.87
  4. Step 4: Simplify right side
    3,979.79x = 19,684,865.44
  5. Step 5: Solve for x
    x = 19,684,865.44/3,979.79
  6. Step 6: Final answer
    x = 4,946.21

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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.