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Finding the Fourth Proportional to 308, 462.08 and 115.68

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Solution

The fourth proportional to 308, 462.08 and 115.68 is: 173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    308 : 462.08 = 115.68 : x
  2. Step 2: Convert to fraction form
    308/462.08 = 115.68/x
  3. Step 3: Cross multiply
    308x = 462.08 × 115.68
  4. Step 4: Simplify right side
    308x = 53,453.41
  5. Step 5: Solve for x
    x = 53,453.41/308
  6. Step 6: Final answer
    x = 173.55

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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.