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Finding the Fourth Proportional to 312.08, 467.82 and 254.42

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Solution

The fourth proportional to 312.08, 467.82 and 254.42 is: 381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.08 : 467.82 = 254.42 : x
  2. Step 2: Convert to fraction form
    312.08/467.82 = 254.42/x
  3. Step 3: Cross multiply
    312.08x = 467.82 × 254.42
  4. Step 4: Simplify right side
    312.08x = 119,022.76
  5. Step 5: Solve for x
    x = 119,022.76/312.08
  6. Step 6: Final answer
    x = 381.39

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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.