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Finding the Fourth Proportional to 548.55, 755.28 and 465.48

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Solution

The fourth proportional to 548.55, 755.28 and 465.48 is: 640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.55 : 755.28 = 465.48 : x
  2. Step 2: Convert to fraction form
    548.55/755.28 = 465.48/x
  3. Step 3: Cross multiply
    548.55x = 755.28 × 465.48
  4. Step 4: Simplify right side
    548.55x = 351,567.73
  5. Step 5: Solve for x
    x = 351,567.73/548.55
  6. Step 6: Final answer
    x = 640.90

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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.