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Finding the Fourth Proportional to 308.67, 426.15 and 192.39

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Solution

The fourth proportional to 308.67, 426.15 and 192.39 is: 265.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.67 : 426.15 = 192.39 : x
  2. Step 2: Convert to fraction form
    308.67/426.15 = 192.39/x
  3. Step 3: Cross multiply
    308.67x = 426.15 × 192.39
  4. Step 4: Simplify right side
    308.67x = 81,987.00
  5. Step 5: Solve for x
    x = 81,987.00/308.67
  6. Step 6: Final answer
    x = 265.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.