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Finding the Fourth Proportional to 548.98, 757.28 and 401.44

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Solution

The fourth proportional to 548.98, 757.28 and 401.44 is: 553.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.98 : 757.28 = 401.44 : x
  2. Step 2: Convert to fraction form
    548.98/757.28 = 401.44/x
  3. Step 3: Cross multiply
    548.98x = 757.28 × 401.44
  4. Step 4: Simplify right side
    548.98x = 304,002.48
  5. Step 5: Solve for x
    x = 304,002.48/548.98
  6. Step 6: Final answer
    x = 553.76

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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.