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Finding the Fourth Proportional to 481.54, 664.11 and 388.25

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Solution

The fourth proportional to 481.54, 664.11 and 388.25 is: 535.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.54 : 664.11 = 388.25 : x
  2. Step 2: Convert to fraction form
    481.54/664.11 = 388.25/x
  3. Step 3: Cross multiply
    481.54x = 664.11 × 388.25
  4. Step 4: Simplify right side
    481.54x = 257,840.71
  5. Step 5: Solve for x
    x = 257,840.71/481.54
  6. Step 6: Final answer
    x = 535.45

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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.