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Finding the Fourth Proportional to 308.09, 462.22 and 91.67

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Solution

The fourth proportional to 308.09, 462.22 and 91.67 is: 137.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.09 : 462.22 = 91.67 : x
  2. Step 2: Convert to fraction form
    308.09/462.22 = 91.67/x
  3. Step 3: Cross multiply
    308.09x = 462.22 × 91.67
  4. Step 4: Simplify right side
    308.09x = 42,371.25
  5. Step 5: Solve for x
    x = 42,371.25/308.09
  6. Step 6: Final answer
    x = 137.53

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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.