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Finding the Fourth Proportional to 394.51, 591.96 and 279.69

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Solution

The fourth proportional to 394.51, 591.96 and 279.69 is: 419.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.51 : 591.96 = 279.69 : x
  2. Step 2: Convert to fraction form
    394.51/591.96 = 279.69/x
  3. Step 3: Cross multiply
    394.51x = 591.96 × 279.69
  4. Step 4: Simplify right side
    394.51x = 165,565.29
  5. Step 5: Solve for x
    x = 165,565.29/394.51
  6. Step 6: Final answer
    x = 419.67

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