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Finding the Fourth Proportional to 288.61, 398.29 and 157.62

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Solution

The fourth proportional to 288.61, 398.29 and 157.62 is: 217.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.61 : 398.29 = 157.62 : x
  2. Step 2: Convert to fraction form
    288.61/398.29 = 157.62/x
  3. Step 3: Cross multiply
    288.61x = 398.29 × 157.62
  4. Step 4: Simplify right side
    288.61x = 62,778.47
  5. Step 5: Solve for x
    x = 62,778.47/288.61
  6. Step 6: Final answer
    x = 217.52

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