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Finding the Fourth Proportional to 194.11, 291.26 and 102.78

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Solution

The fourth proportional to 194.11, 291.26 and 102.78 is: 154.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.11 : 291.26 = 102.78 : x
  2. Step 2: Convert to fraction form
    194.11/291.26 = 102.78/x
  3. Step 3: Cross multiply
    194.11x = 291.26 × 102.78
  4. Step 4: Simplify right side
    194.11x = 29,935.96
  5. Step 5: Solve for x
    x = 29,935.96/194.11
  6. Step 6: Final answer
    x = 154.22

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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.