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Finding the Fourth Proportional to 308.48, 462.65 and 91.94

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Solution

The fourth proportional to 308.48, 462.65 and 91.94 is: 137.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.48 : 462.65 = 91.94 : x
  2. Step 2: Convert to fraction form
    308.48/462.65 = 91.94/x
  3. Step 3: Cross multiply
    308.48x = 462.65 × 91.94
  4. Step 4: Simplify right side
    308.48x = 42,533.27
  5. Step 5: Solve for x
    x = 42,533.27/308.48
  6. Step 6: Final answer
    x = 137.88

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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.