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Finding the Fourth Proportional to 219.13, 328.73 and 74.81

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Solution

The fourth proportional to 219.13, 328.73 and 74.81 is: 112.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.13 : 328.73 = 74.81 : x
  2. Step 2: Convert to fraction form
    219.13/328.73 = 74.81/x
  3. Step 3: Cross multiply
    219.13x = 328.73 × 74.81
  4. Step 4: Simplify right side
    219.13x = 24,592.74
  5. Step 5: Solve for x
    x = 24,592.74/219.13
  6. Step 6: Final answer
    x = 112.23

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