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Finding the Fourth Proportional to 489.93, 734.90 and 215.96

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Solution

The fourth proportional to 489.93, 734.90 and 215.96 is: 323.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.93 : 734.90 = 215.96 : x
  2. Step 2: Convert to fraction form
    489.93/734.90 = 215.96/x
  3. Step 3: Cross multiply
    489.93x = 734.90 × 215.96
  4. Step 4: Simplify right side
    489.93x = 158,707.92
  5. Step 5: Solve for x
    x = 158,707.92/489.93
  6. Step 6: Final answer
    x = 323.94

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