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Finding the Fourth Proportional to 194.27, 291.20 and 72.50

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Solution

The fourth proportional to 194.27, 291.20 and 72.50 is: 108.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.27 : 291.20 = 72.50 : x
  2. Step 2: Convert to fraction form
    194.27/291.20 = 72.50/x
  3. Step 3: Cross multiply
    194.27x = 291.20 × 72.50
  4. Step 4: Simplify right side
    194.27x = 21,110.18
  5. Step 5: Solve for x
    x = 21,110.18/194.27
  6. Step 6: Final answer
    x = 108.67

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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.