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Finding the Fourth Proportional to 3,687.21, 5,530.86 and 1,090.20

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Solution

The fourth proportional to 3,687.21, 5,530.86 and 1,090.20 is: 1,635.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,687.21 : 5,530.86 = 1,090.20 : x
  2. Step 2: Convert to fraction form
    3,687.21/5,530.86 = 1,090.20/x
  3. Step 3: Cross multiply
    3,687.21x = 5,530.86 × 1,090.20
  4. Step 4: Simplify right side
    3,687.21x = 6,029,743.57
  5. Step 5: Solve for x
    x = 6,029,743.57/3,687.21
  6. Step 6: Final answer
    x = 1,635.31

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