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Finding the Fourth Proportional to 577.81, 866.72 and 212.44

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Solution

The fourth proportional to 577.81, 866.72 and 212.44 is: 318.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.81 : 866.72 = 212.44 : x
  2. Step 2: Convert to fraction form
    577.81/866.72 = 212.44/x
  3. Step 3: Cross multiply
    577.81x = 866.72 × 212.44
  4. Step 4: Simplify right side
    577.81x = 184,124.93
  5. Step 5: Solve for x
    x = 184,124.93/577.81
  6. Step 6: Final answer
    x = 318.66

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