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Finding the Fourth Proportional to 196.40, 294.20 and 124

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Solution

The fourth proportional to 196.40, 294.20 and 124 is: 185.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.40 : 294.20 = 124 : x
  2. Step 2: Convert to fraction form
    196.40/294.20 = 124/x
  3. Step 3: Cross multiply
    196.40x = 294.20 × 124
  4. Step 4: Simplify right side
    196.40x = 36,480.80
  5. Step 5: Solve for x
    x = 36,480.80/196.40
  6. Step 6: Final answer
    x = 185.75

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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.