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Finding the Fourth Proportional to 399.26, 598.86 and 155.86

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Solution

The fourth proportional to 399.26, 598.86 and 155.86 is: 233.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.26 : 598.86 = 155.86 : x
  2. Step 2: Convert to fraction form
    399.26/598.86 = 155.86/x
  3. Step 3: Cross multiply
    399.26x = 598.86 × 155.86
  4. Step 4: Simplify right side
    399.26x = 93,336.82
  5. Step 5: Solve for x
    x = 93,336.82/399.26
  6. Step 6: Final answer
    x = 233.77

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