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Finding the Fourth Proportional to 405, 558.90 and 230.36

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Solution

The fourth proportional to 405, 558.90 and 230.36 is: 317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    405 : 558.90 = 230.36 : x
  2. Step 2: Convert to fraction form
    405/558.90 = 230.36/x
  3. Step 3: Cross multiply
    405x = 558.90 × 230.36
  4. Step 4: Simplify right side
    405x = 128,745.41
  5. Step 5: Solve for x
    x = 128,745.41/405
  6. Step 6: Final answer
    x = 317.89

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