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Finding the Fourth Proportional to 626.76, 864.72 and 405.99

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Solution

The fourth proportional to 626.76, 864.72 and 405.99 is: 560.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.76 : 864.72 = 405.99 : x
  2. Step 2: Convert to fraction form
    626.76/864.72 = 405.99/x
  3. Step 3: Cross multiply
    626.76x = 864.72 × 405.99
  4. Step 4: Simplify right side
    626.76x = 351,067.67
  5. Step 5: Solve for x
    x = 351,067.67/626.76
  6. Step 6: Final answer
    x = 560.13

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