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Finding the Fourth Proportional to 636.65, 955.12 and 197.88

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Solution

The fourth proportional to 636.65, 955.12 and 197.88 is: 296.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.65 : 955.12 = 197.88 : x
  2. Step 2: Convert to fraction form
    636.65/955.12 = 197.88/x
  3. Step 3: Cross multiply
    636.65x = 955.12 × 197.88
  4. Step 4: Simplify right side
    636.65x = 188,993.38
  5. Step 5: Solve for x
    x = 188,993.38/636.65
  6. Step 6: Final answer
    x = 296.86

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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.