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Finding the Fourth Proportional to 194.28, 291.48 and 72.55

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Solution

The fourth proportional to 194.28, 291.48 and 72.55 is: 108.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.28 : 291.48 = 72.55 : x
  2. Step 2: Convert to fraction form
    194.28/291.48 = 72.55/x
  3. Step 3: Cross multiply
    194.28x = 291.48 × 72.55
  4. Step 4: Simplify right side
    194.28x = 21,145.78
  5. Step 5: Solve for x
    x = 21,145.78/194.28
  6. Step 6: Final answer
    x = 108.84

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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.