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Finding the Fourth Proportional to 308.17, 462.30 and 91.77

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Solution

The fourth proportional to 308.17, 462.30 and 91.77 is: 137.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.17 : 462.30 = 91.77 : x
  2. Step 2: Convert to fraction form
    308.17/462.30 = 91.77/x
  3. Step 3: Cross multiply
    308.17x = 462.30 × 91.77
  4. Step 4: Simplify right side
    308.17x = 42,425.27
  5. Step 5: Solve for x
    x = 42,425.27/308.17
  6. Step 6: Final answer
    x = 137.67

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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.