Home / 3,969.83-5,478.68-2,201.78

Finding the Fourth Proportional to 3,969.83, 5,478.68 and 2,201.78

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Solution

The fourth proportional to 3,969.83, 5,478.68 and 2,201.78 is: 3,038.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.83 : 5,478.68 = 2,201.78 : x
  2. Step 2: Convert to fraction form
    3,969.83/5,478.68 = 2,201.78/x
  3. Step 3: Cross multiply
    3,969.83x = 5,478.68 × 2,201.78
  4. Step 4: Simplify right side
    3,969.83x = 12,062,848.05
  5. Step 5: Solve for x
    x = 12,062,848.05/3,969.83
  6. Step 6: Final answer
    x = 3,038.63

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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.