Home / 3,969.52-5,478.06-2,201.20

Finding the Fourth Proportional to 3,969.52, 5,478.06 and 2,201.20

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Solution

The fourth proportional to 3,969.52, 5,478.06 and 2,201.20 is: 3,037.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.52 : 5,478.06 = 2,201.20 : x
  2. Step 2: Convert to fraction form
    3,969.52/5,478.06 = 2,201.20/x
  3. Step 3: Cross multiply
    3,969.52x = 5,478.06 × 2,201.20
  4. Step 4: Simplify right side
    3,969.52x = 12,058,305.67
  5. Step 5: Solve for x
    x = 12,058,305.67/3,969.52
  6. Step 6: Final answer
    x = 3,037.72

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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.