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Finding the Fourth Proportional to 609.12, 913.91 and 365.82

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Solution

The fourth proportional to 609.12, 913.91 and 365.82 is: 548.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.12 : 913.91 = 365.82 : x
  2. Step 2: Convert to fraction form
    609.12/913.91 = 365.82/x
  3. Step 3: Cross multiply
    609.12x = 913.91 × 365.82
  4. Step 4: Simplify right side
    609.12x = 334,321.99
  5. Step 5: Solve for x
    x = 334,321.99/609.12
  6. Step 6: Final answer
    x = 548.86

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