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Finding the Fourth Proportional to 485.97, 729.05 and 161.57

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Solution

The fourth proportional to 485.97, 729.05 and 161.57 is: 242.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.97 : 729.05 = 161.57 : x
  2. Step 2: Convert to fraction form
    485.97/729.05 = 161.57/x
  3. Step 3: Cross multiply
    485.97x = 729.05 × 161.57
  4. Step 4: Simplify right side
    485.97x = 117,788.16
  5. Step 5: Solve for x
    x = 117,788.16/485.97
  6. Step 6: Final answer
    x = 242.38

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