Home / 3,984.40-5,979.30-1,521.28

Finding the Fourth Proportional to 3,984.40, 5,979.30 and 1,521.28

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Solution

The fourth proportional to 3,984.40, 5,979.30 and 1,521.28 is: 2,282.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.40 : 5,979.30 = 1,521.28 : x
  2. Step 2: Convert to fraction form
    3,984.40/5,979.30 = 1,521.28/x
  3. Step 3: Cross multiply
    3,984.40x = 5,979.30 × 1,521.28
  4. Step 4: Simplify right side
    3,984.40x = 9,096,189.50
  5. Step 5: Solve for x
    x = 9,096,189.50/3,984.40
  6. Step 6: Final answer
    x = 2,282.95

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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.