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Finding the Fourth Proportional to 418.61, 577.69 and 252.80

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Solution

The fourth proportional to 418.61, 577.69 and 252.80 is: 348.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.61 : 577.69 = 252.80 : x
  2. Step 2: Convert to fraction form
    418.61/577.69 = 252.80/x
  3. Step 3: Cross multiply
    418.61x = 577.69 × 252.80
  4. Step 4: Simplify right side
    418.61x = 146,037.46
  5. Step 5: Solve for x
    x = 146,037.46/418.61
  6. Step 6: Final answer
    x = 348.86

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