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Finding the Fourth Proportional to 620.54, 857.25 and 481.22

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Solution

The fourth proportional to 620.54, 857.25 and 481.22 is: 664.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.54 : 857.25 = 481.22 : x
  2. Step 2: Convert to fraction form
    620.54/857.25 = 481.22/x
  3. Step 3: Cross multiply
    620.54x = 857.25 × 481.22
  4. Step 4: Simplify right side
    620.54x = 412,525.85
  5. Step 5: Solve for x
    x = 412,525.85/620.54
  6. Step 6: Final answer
    x = 664.79

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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.