Home / 3,949.09-5,449.68-2,180.79

Finding the Fourth Proportional to 3,949.09, 5,449.68 and 2,180.79

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Solution

The fourth proportional to 3,949.09, 5,449.68 and 2,180.79 is: 3,009.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.09 : 5,449.68 = 2,180.79 : x
  2. Step 2: Convert to fraction form
    3,949.09/5,449.68 = 2,180.79/x
  3. Step 3: Cross multiply
    3,949.09x = 5,449.68 × 2,180.79
  4. Step 4: Simplify right side
    3,949.09x = 11,884,607.65
  5. Step 5: Solve for x
    x = 11,884,607.65/3,949.09
  6. Step 6: Final answer
    x = 3,009.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.