Home / 3,639.60-5,455.80-1,789.20

Finding the Fourth Proportional to 3,639.60, 5,455.80 and 1,789.20

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Solution

The fourth proportional to 3,639.60, 5,455.80 and 1,789.20 is: 2,682.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.60 : 5,455.80 = 1,789.20 : x
  2. Step 2: Convert to fraction form
    3,639.60/5,455.80 = 1,789.20/x
  3. Step 3: Cross multiply
    3,639.60x = 5,455.80 × 1,789.20
  4. Step 4: Simplify right side
    3,639.60x = 9,761,517.36
  5. Step 5: Solve for x
    x = 9,761,517.36/3,639.60
  6. Step 6: Final answer
    x = 2,682.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.