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Finding the Fourth Proportional to 549.20, 822.98 and 305.39

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Solution

The fourth proportional to 549.20, 822.98 and 305.39 is: 457.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.20 : 822.98 = 305.39 : x
  2. Step 2: Convert to fraction form
    549.20/822.98 = 305.39/x
  3. Step 3: Cross multiply
    549.20x = 822.98 × 305.39
  4. Step 4: Simplify right side
    549.20x = 251,325.75
  5. Step 5: Solve for x
    x = 251,325.75/549.20
  6. Step 6: Final answer
    x = 457.63

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