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Finding the Fourth Proportional to 196.55, 270.60 and 170.21

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Solution

The fourth proportional to 196.55, 270.60 and 170.21 is: 234.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.55 : 270.60 = 170.21 : x
  2. Step 2: Convert to fraction form
    196.55/270.60 = 170.21/x
  3. Step 3: Cross multiply
    196.55x = 270.60 × 170.21
  4. Step 4: Simplify right side
    196.55x = 46,058.83
  5. Step 5: Solve for x
    x = 46,058.83/196.55
  6. Step 6: Final answer
    x = 234.34

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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.