Home / 3,969.60-5,478.36-2,201.16

Finding the Fourth Proportional to 3,969.60, 5,478.36 and 2,201.16

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Solution

The fourth proportional to 3,969.60, 5,478.36 and 2,201.16 is: 3,037.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.60 : 5,478.36 = 2,201.16 : x
  2. Step 2: Convert to fraction form
    3,969.60/5,478.36 = 2,201.16/x
  3. Step 3: Cross multiply
    3,969.60x = 5,478.36 × 2,201.16
  4. Step 4: Simplify right side
    3,969.60x = 12,058,746.90
  5. Step 5: Solve for x
    x = 12,058,746.90/3,969.60
  6. Step 6: Final answer
    x = 3,037.77

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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.