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Finding the Fourth Proportional to 428.85, 591.81 and 251.92

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Solution

The fourth proportional to 428.85, 591.81 and 251.92 is: 347.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.85 : 591.81 = 251.92 : x
  2. Step 2: Convert to fraction form
    428.85/591.81 = 251.92/x
  3. Step 3: Cross multiply
    428.85x = 591.81 × 251.92
  4. Step 4: Simplify right side
    428.85x = 149,087.30
  5. Step 5: Solve for x
    x = 149,087.30/428.85
  6. Step 6: Final answer
    x = 347.64

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