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Finding the Fourth Proportional to 919.23, 1,378.89 and 270.02

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Solution

The fourth proportional to 919.23, 1,378.89 and 270.02 is: 405.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.23 : 1,378.89 = 270.02 : x
  2. Step 2: Convert to fraction form
    919.23/1,378.89 = 270.02/x
  3. Step 3: Cross multiply
    919.23x = 1,378.89 × 270.02
  4. Step 4: Simplify right side
    919.23x = 372,320.98
  5. Step 5: Solve for x
    x = 372,320.98/919.23
  6. Step 6: Final answer
    x = 405.04

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