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Finding the Fourth Proportional to 196.88, 295.20 and 178.40

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Solution

The fourth proportional to 196.88, 295.20 and 178.40 is: 267.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.88 : 295.20 = 178.40 : x
  2. Step 2: Convert to fraction form
    196.88/295.20 = 178.40/x
  3. Step 3: Cross multiply
    196.88x = 295.20 × 178.40
  4. Step 4: Simplify right side
    196.88x = 52,663.68
  5. Step 5: Solve for x
    x = 52,663.68/196.88
  6. Step 6: Final answer
    x = 267.49

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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.