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Finding the Fourth Proportional to 227.92, 342.16 and 155.28

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Solution

The fourth proportional to 227.92, 342.16 and 155.28 is: 233.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.92 : 342.16 = 155.28 : x
  2. Step 2: Convert to fraction form
    227.92/342.16 = 155.28/x
  3. Step 3: Cross multiply
    227.92x = 342.16 × 155.28
  4. Step 4: Simplify right side
    227.92x = 53,130.60
  5. Step 5: Solve for x
    x = 53,130.60/227.92
  6. Step 6: Final answer
    x = 233.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.