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Finding the Fourth Proportional to 228.76, 342.24 and 156.40

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Solution

The fourth proportional to 228.76, 342.24 and 156.40 is: 233.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.76 : 342.24 = 156.40 : x
  2. Step 2: Convert to fraction form
    228.76/342.24 = 156.40/x
  3. Step 3: Cross multiply
    228.76x = 342.24 × 156.40
  4. Step 4: Simplify right side
    228.76x = 53,526.34
  5. Step 5: Solve for x
    x = 53,526.34/228.76
  6. Step 6: Final answer
    x = 233.98

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