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Finding the Fourth Proportional to 453.87, 680.28 and 209.89

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Solution

The fourth proportional to 453.87, 680.28 and 209.89 is: 314.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.87 : 680.28 = 209.89 : x
  2. Step 2: Convert to fraction form
    453.87/680.28 = 209.89/x
  3. Step 3: Cross multiply
    453.87x = 680.28 × 209.89
  4. Step 4: Simplify right side
    453.87x = 142,783.97
  5. Step 5: Solve for x
    x = 142,783.97/453.87
  6. Step 6: Final answer
    x = 314.59

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