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Finding the Fourth Proportional to 481.78, 664.77 and 295.21

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Solution

The fourth proportional to 481.78, 664.77 and 295.21 is: 407.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.78 : 664.77 = 295.21 : x
  2. Step 2: Convert to fraction form
    481.78/664.77 = 295.21/x
  3. Step 3: Cross multiply
    481.78x = 664.77 × 295.21
  4. Step 4: Simplify right side
    481.78x = 196,246.75
  5. Step 5: Solve for x
    x = 196,246.75/481.78
  6. Step 6: Final answer
    x = 407.34

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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.