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Finding the Fourth Proportional to 481.83, 664.50 and 388.54

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Solution

The fourth proportional to 481.83, 664.50 and 388.54 is: 535.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.83 : 664.50 = 388.54 : x
  2. Step 2: Convert to fraction form
    481.83/664.50 = 388.54/x
  3. Step 3: Cross multiply
    481.83x = 664.50 × 388.54
  4. Step 4: Simplify right side
    481.83x = 258,184.83
  5. Step 5: Solve for x
    x = 258,184.83/481.83
  6. Step 6: Final answer
    x = 535.84

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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.