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Finding the Fourth Proportional to 308.88, 426.18 and 192.36

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Solution

The fourth proportional to 308.88, 426.18 and 192.36 is: 265.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.88 : 426.18 = 192.36 : x
  2. Step 2: Convert to fraction form
    308.88/426.18 = 192.36/x
  3. Step 3: Cross multiply
    308.88x = 426.18 × 192.36
  4. Step 4: Simplify right side
    308.88x = 81,979.98
  5. Step 5: Solve for x
    x = 81,979.98/308.88
  6. Step 6: Final answer
    x = 265.41

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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.