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Finding the Fourth Proportional to 342.75, 514.31 and 126.39

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Solution

The fourth proportional to 342.75, 514.31 and 126.39 is: 189.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.75 : 514.31 = 126.39 : x
  2. Step 2: Convert to fraction form
    342.75/514.31 = 126.39/x
  3. Step 3: Cross multiply
    342.75x = 514.31 × 126.39
  4. Step 4: Simplify right side
    342.75x = 65,003.01
  5. Step 5: Solve for x
    x = 65,003.01/342.75
  6. Step 6: Final answer
    x = 189.65

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