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Finding the Fourth Proportional to 548.10, 755.10 and 449.28

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Solution

The fourth proportional to 548.10, 755.10 and 449.28 is: 618.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.10 : 755.10 = 449.28 : x
  2. Step 2: Convert to fraction form
    548.10/755.10 = 449.28/x
  3. Step 3: Cross multiply
    548.10x = 755.10 × 449.28
  4. Step 4: Simplify right side
    548.10x = 339,251.33
  5. Step 5: Solve for x
    x = 339,251.33/548.10
  6. Step 6: Final answer
    x = 618.96

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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.