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Finding the Fourth Proportional to 427.15, 640.34 and 153.18

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Solution

The fourth proportional to 427.15, 640.34 and 153.18 is: 229.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.15 : 640.34 = 153.18 : x
  2. Step 2: Convert to fraction form
    427.15/640.34 = 153.18/x
  3. Step 3: Cross multiply
    427.15x = 640.34 × 153.18
  4. Step 4: Simplify right side
    427.15x = 98,085.00
  5. Step 5: Solve for x
    x = 98,085.00/427.15
  6. Step 6: Final answer
    x = 229.63

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