Home / 3,979.80-5,970.24-1,206.15

Finding the Fourth Proportional to 3,979.80, 5,970.24 and 1,206.15

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Solution

The fourth proportional to 3,979.80, 5,970.24 and 1,206.15 is: 1,809.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.80 : 5,970.24 = 1,206.15 : x
  2. Step 2: Convert to fraction form
    3,979.80/5,970.24 = 1,206.15/x
  3. Step 3: Cross multiply
    3,979.80x = 5,970.24 × 1,206.15
  4. Step 4: Simplify right side
    3,979.80x = 7,201,004.98
  5. Step 5: Solve for x
    x = 7,201,004.98/3,979.80
  6. Step 6: Final answer
    x = 1,809.39

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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.