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Finding the Fourth Proportional to 614, 920.39 and 288.79

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Solution

The fourth proportional to 614, 920.39 and 288.79 is: 432.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    614 : 920.39 = 288.79 : x
  2. Step 2: Convert to fraction form
    614/920.39 = 288.79/x
  3. Step 3: Cross multiply
    614x = 920.39 × 288.79
  4. Step 4: Simplify right side
    614x = 265,799.43
  5. Step 5: Solve for x
    x = 265,799.43/614
  6. Step 6: Final answer
    x = 432.90

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