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Finding the Fourth Proportional to 196.22, 294.40 and 127.90

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Solution

The fourth proportional to 196.22, 294.40 and 127.90 is: 191.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.22 : 294.40 = 127.90 : x
  2. Step 2: Convert to fraction form
    196.22/294.40 = 127.90/x
  3. Step 3: Cross multiply
    196.22x = 294.40 × 127.90
  4. Step 4: Simplify right side
    196.22x = 37,653.76
  5. Step 5: Solve for x
    x = 37,653.76/196.22
  6. Step 6: Final answer
    x = 191.90

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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.