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Finding the Fourth Proportional to 300.70, 450.99 and 84.22

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Solution

The fourth proportional to 300.70, 450.99 and 84.22 is: 126.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.70 : 450.99 = 84.22 : x
  2. Step 2: Convert to fraction form
    300.70/450.99 = 84.22/x
  3. Step 3: Cross multiply
    300.70x = 450.99 × 84.22
  4. Step 4: Simplify right side
    300.70x = 37,982.38
  5. Step 5: Solve for x
    x = 37,982.38/300.70
  6. Step 6: Final answer
    x = 126.31

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