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Finding the Fourth Proportional to 196.16, 270.48 and 165.28

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Solution

The fourth proportional to 196.16, 270.48 and 165.28 is: 227.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.16 : 270.48 = 165.28 : x
  2. Step 2: Convert to fraction form
    196.16/270.48 = 165.28/x
  3. Step 3: Cross multiply
    196.16x = 270.48 × 165.28
  4. Step 4: Simplify right side
    196.16x = 44,704.93
  5. Step 5: Solve for x
    x = 44,704.93/196.16
  6. Step 6: Final answer
    x = 227.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.