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Finding the Fourth Proportional to 496.80, 685.56 and 275.76

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Solution

The fourth proportional to 496.80, 685.56 and 275.76 is: 380.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.80 : 685.56 = 275.76 : x
  2. Step 2: Convert to fraction form
    496.80/685.56 = 275.76/x
  3. Step 3: Cross multiply
    496.80x = 685.56 × 275.76
  4. Step 4: Simplify right side
    496.80x = 189,046.60
  5. Step 5: Solve for x
    x = 189,046.60/496.80
  6. Step 6: Final answer
    x = 380.53

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