Home / 3,209.49-4,820.61-1,979.30

Finding the Fourth Proportional to 3,209.49, 4,820.61 and 1,979.30

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Solution

The fourth proportional to 3,209.49, 4,820.61 and 1,979.30 is: 2,972.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209.49 : 4,820.61 = 1,979.30 : x
  2. Step 2: Convert to fraction form
    3,209.49/4,820.61 = 1,979.30/x
  3. Step 3: Cross multiply
    3,209.49x = 4,820.61 × 1,979.30
  4. Step 4: Simplify right side
    3,209.49x = 9,541,452.85
  5. Step 5: Solve for x
    x = 9,541,452.85/3,209.49
  6. Step 6: Final answer
    x = 2,972.89

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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.