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Finding the Fourth Proportional to 640.25, 960.40 and 366.22

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Solution

The fourth proportional to 640.25, 960.40 and 366.22 is: 549.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.25 : 960.40 = 366.22 : x
  2. Step 2: Convert to fraction form
    640.25/960.40 = 366.22/x
  3. Step 3: Cross multiply
    640.25x = 960.40 × 366.22
  4. Step 4: Simplify right side
    640.25x = 351,712.89
  5. Step 5: Solve for x
    x = 351,712.89/640.25
  6. Step 6: Final answer
    x = 549.34

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