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Finding the Fourth Proportional to 451.92, 676.88 and 280.56

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Solution

The fourth proportional to 451.92, 676.88 and 280.56 is: 420.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.92 : 676.88 = 280.56 : x
  2. Step 2: Convert to fraction form
    451.92/676.88 = 280.56/x
  3. Step 3: Cross multiply
    451.92x = 676.88 × 280.56
  4. Step 4: Simplify right side
    451.92x = 189,905.45
  5. Step 5: Solve for x
    x = 189,905.45/451.92
  6. Step 6: Final answer
    x = 420.22

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