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Finding the Fourth Proportional to 548.55, 821.97 and 270.58

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Solution

The fourth proportional to 548.55, 821.97 and 270.58 is: 405.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.55 : 821.97 = 270.58 : x
  2. Step 2: Convert to fraction form
    548.55/821.97 = 270.58/x
  3. Step 3: Cross multiply
    548.55x = 821.97 × 270.58
  4. Step 4: Simplify right side
    548.55x = 222,408.64
  5. Step 5: Solve for x
    x = 222,408.64/548.55
  6. Step 6: Final answer
    x = 405.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.