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Finding the Fourth Proportional to 548.51, 755.02 and 478.44

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Solution

The fourth proportional to 548.51, 755.02 and 478.44 is: 658.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.51 : 755.02 = 478.44 : x
  2. Step 2: Convert to fraction form
    548.51/755.02 = 478.44/x
  3. Step 3: Cross multiply
    548.51x = 755.02 × 478.44
  4. Step 4: Simplify right side
    548.51x = 361,229.38
  5. Step 5: Solve for x
    x = 361,229.38/548.51
  6. Step 6: Final answer
    x = 658.57

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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.