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Finding the Fourth Proportional to 479, 661.16 and 423.92

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Solution

The fourth proportional to 479, 661.16 and 423.92 is: 585.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    479 : 661.16 = 423.92 : x
  2. Step 2: Convert to fraction form
    479/661.16 = 423.92/x
  3. Step 3: Cross multiply
    479x = 661.16 × 423.92
  4. Step 4: Simplify right side
    479x = 280,278.95
  5. Step 5: Solve for x
    x = 280,278.95/479
  6. Step 6: Final answer
    x = 585.13

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