Home / 3,984.52-5,979.18-1,389.28

Finding the Fourth Proportional to 3,984.52, 5,979.18 and 1,389.28

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Solution

The fourth proportional to 3,984.52, 5,979.18 and 1,389.28 is: 2,084.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.52 : 5,979.18 = 1,389.28 : x
  2. Step 2: Convert to fraction form
    3,984.52/5,979.18 = 1,389.28/x
  3. Step 3: Cross multiply
    3,984.52x = 5,979.18 × 1,389.28
  4. Step 4: Simplify right side
    3,984.52x = 8,306,718.35
  5. Step 5: Solve for x
    x = 8,306,718.35/3,984.52
  6. Step 6: Final answer
    x = 2,084.75

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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.