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Finding the Fourth Proportional to 308.18, 425.12 and 255.98

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Solution

The fourth proportional to 308.18, 425.12 and 255.98 is: 353.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.18 : 425.12 = 255.98 : x
  2. Step 2: Convert to fraction form
    308.18/425.12 = 255.98/x
  3. Step 3: Cross multiply
    308.18x = 425.12 × 255.98
  4. Step 4: Simplify right side
    308.18x = 108,822.00
  5. Step 5: Solve for x
    x = 108,822.00/308.18
  6. Step 6: Final answer
    x = 353.11

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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.