Home / 3,949.19-5,449.89-2,180.78

Finding the Fourth Proportional to 3,949.19, 5,449.89 and 2,180.78

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Solution

The fourth proportional to 3,949.19, 5,449.89 and 2,180.78 is: 3,009.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,949.19 : 5,449.89 = 2,180.78 : x
  2. Step 2: Convert to fraction form
    3,949.19/5,449.89 = 2,180.78/x
  3. Step 3: Cross multiply
    3,949.19x = 5,449.89 × 2,180.78
  4. Step 4: Simplify right side
    3,949.19x = 11,885,011.11
  5. Step 5: Solve for x
    x = 11,885,011.11/3,949.19
  6. Step 6: Final answer
    x = 3,009.48

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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.