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Finding the Fourth Proportional to 417.84, 625.80 and 225

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Solution

The fourth proportional to 417.84, 625.80 and 225 is: 336.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.84 : 625.80 = 225 : x
  2. Step 2: Convert to fraction form
    417.84/625.80 = 225/x
  3. Step 3: Cross multiply
    417.84x = 625.80 × 225
  4. Step 4: Simplify right side
    417.84x = 140,805
  5. Step 5: Solve for x
    x = 140,805/417.84
  6. Step 6: Final answer
    x = 336.98

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