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Finding the Fourth Proportional to 286.75, 430.13 and 132.80

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Solution

The fourth proportional to 286.75, 430.13 and 132.80 is: 199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.75 : 430.13 = 132.80 : x
  2. Step 2: Convert to fraction form
    286.75/430.13 = 132.80/x
  3. Step 3: Cross multiply
    286.75x = 430.13 × 132.80
  4. Step 4: Simplify right side
    286.75x = 57,120.60
  5. Step 5: Solve for x
    x = 57,120.60/286.75
  6. Step 6: Final answer
    x = 199.20

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