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Finding the Fourth Proportional to 412.88, 617.78 and 248.44

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Solution

The fourth proportional to 412.88, 617.78 and 248.44 is: 371.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.88 : 617.78 = 248.44 : x
  2. Step 2: Convert to fraction form
    412.88/617.78 = 248.44/x
  3. Step 3: Cross multiply
    412.88x = 617.78 × 248.44
  4. Step 4: Simplify right side
    412.88x = 153,481.26
  5. Step 5: Solve for x
    x = 153,481.26/412.88
  6. Step 6: Final answer
    x = 371.73

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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.