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Finding the Fourth Proportional to 284.14, 426.12 and 121.78

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Solution

The fourth proportional to 284.14, 426.12 and 121.78 is: 182.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.14 : 426.12 = 121.78 : x
  2. Step 2: Convert to fraction form
    284.14/426.12 = 121.78/x
  3. Step 3: Cross multiply
    284.14x = 426.12 × 121.78
  4. Step 4: Simplify right side
    284.14x = 51,892.89
  5. Step 5: Solve for x
    x = 51,892.89/284.14
  6. Step 6: Final answer
    x = 182.63

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