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Finding the Fourth Proportional to 517.74, 776.08 and 286.57

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Solution

The fourth proportional to 517.74, 776.08 and 286.57 is: 429.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.74 : 776.08 = 286.57 : x
  2. Step 2: Convert to fraction form
    517.74/776.08 = 286.57/x
  3. Step 3: Cross multiply
    517.74x = 776.08 × 286.57
  4. Step 4: Simplify right side
    517.74x = 222,401.25
  5. Step 5: Solve for x
    x = 222,401.25/517.74
  6. Step 6: Final answer
    x = 429.56

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