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Finding the Fourth Proportional to 207.84, 312.21 and 126.73

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Solution

The fourth proportional to 207.84, 312.21 and 126.73 is: 190.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.84 : 312.21 = 126.73 : x
  2. Step 2: Convert to fraction form
    207.84/312.21 = 126.73/x
  3. Step 3: Cross multiply
    207.84x = 312.21 × 126.73
  4. Step 4: Simplify right side
    207.84x = 39,566.37
  5. Step 5: Solve for x
    x = 39,566.37/207.84
  6. Step 6: Final answer
    x = 190.37

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