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Finding the Fourth Proportional to 486.96, 730.71 and 198.60

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Solution

The fourth proportional to 486.96, 730.71 and 198.60 is: 298.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.96 : 730.71 = 198.60 : x
  2. Step 2: Convert to fraction form
    486.96/730.71 = 198.60/x
  3. Step 3: Cross multiply
    486.96x = 730.71 × 198.60
  4. Step 4: Simplify right side
    486.96x = 145,119.01
  5. Step 5: Solve for x
    x = 145,119.01/486.96
  6. Step 6: Final answer
    x = 298.01

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