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Finding the Fourth Proportional to 396.08, 546.51 and 285.72

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Solution

The fourth proportional to 396.08, 546.51 and 285.72 is: 394.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.08 : 546.51 = 285.72 : x
  2. Step 2: Convert to fraction form
    396.08/546.51 = 285.72/x
  3. Step 3: Cross multiply
    396.08x = 546.51 × 285.72
  4. Step 4: Simplify right side
    396.08x = 156,148.84
  5. Step 5: Solve for x
    x = 156,148.84/396.08
  6. Step 6: Final answer
    x = 394.24

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