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Finding the Fourth Proportional to 522.05, 782.79 and 385.19

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Solution

The fourth proportional to 522.05, 782.79 and 385.19 is: 577.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.05 : 782.79 = 385.19 : x
  2. Step 2: Convert to fraction form
    522.05/782.79 = 385.19/x
  3. Step 3: Cross multiply
    522.05x = 782.79 × 385.19
  4. Step 4: Simplify right side
    522.05x = 301,518.97
  5. Step 5: Solve for x
    x = 301,518.97/522.05
  6. Step 6: Final answer
    x = 577.57

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