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Finding the Fourth Proportional to 553.34, 829.73 and 206.61

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Solution

The fourth proportional to 553.34, 829.73 and 206.61 is: 309.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.34 : 829.73 = 206.61 : x
  2. Step 2: Convert to fraction form
    553.34/829.73 = 206.61/x
  3. Step 3: Cross multiply
    553.34x = 829.73 × 206.61
  4. Step 4: Simplify right side
    553.34x = 171,429.48
  5. Step 5: Solve for x
    x = 171,429.48/553.34
  6. Step 6: Final answer
    x = 309.81

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