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Finding the Fourth Proportional to 196.91, 271.60 and 170.64

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Solution

The fourth proportional to 196.91, 271.60 and 170.64 is: 235.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.91 : 271.60 = 170.64 : x
  2. Step 2: Convert to fraction form
    196.91/271.60 = 170.64/x
  3. Step 3: Cross multiply
    196.91x = 271.60 × 170.64
  4. Step 4: Simplify right side
    196.91x = 46,344.25
  5. Step 5: Solve for x
    x = 46,344.25/196.91
  6. Step 6: Final answer
    x = 235.36

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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.