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Finding the Fourth Proportional to 545.78, 818.79 and 161.06

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Solution

The fourth proportional to 545.78, 818.79 and 161.06 is: 241.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.78 : 818.79 = 161.06 : x
  2. Step 2: Convert to fraction form
    545.78/818.79 = 161.06/x
  3. Step 3: Cross multiply
    545.78x = 818.79 × 161.06
  4. Step 4: Simplify right side
    545.78x = 131,874.32
  5. Step 5: Solve for x
    x = 131,874.32/545.78
  6. Step 6: Final answer
    x = 241.63

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