Home / 3,979.80-5,969.65-1,346.75

Finding the Fourth Proportional to 3,979.80, 5,969.65 and 1,346.75

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Solution

The fourth proportional to 3,979.80, 5,969.65 and 1,346.75 is: 2,020.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.80 : 5,969.65 = 1,346.75 : x
  2. Step 2: Convert to fraction form
    3,979.80/5,969.65 = 1,346.75/x
  3. Step 3: Cross multiply
    3,979.80x = 5,969.65 × 1,346.75
  4. Step 4: Simplify right side
    3,979.80x = 8,039,626.14
  5. Step 5: Solve for x
    x = 8,039,626.14/3,979.80
  6. Step 6: Final answer
    x = 2,020.11

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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.