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Finding the Fourth Proportional to 194.66, 291.92 and 66.38

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Solution

The fourth proportional to 194.66, 291.92 and 66.38 is: 99.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.66 : 291.92 = 66.38 : x
  2. Step 2: Convert to fraction form
    194.66/291.92 = 66.38/x
  3. Step 3: Cross multiply
    194.66x = 291.92 × 66.38
  4. Step 4: Simplify right side
    194.66x = 19,375.86
  5. Step 5: Solve for x
    x = 19,375.86/194.66
  6. Step 6: Final answer
    x = 99.54

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.