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Finding the Fourth Proportional to 547.62, 821.40 and 331.14

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Solution

The fourth proportional to 547.62, 821.40 and 331.14 is: 496.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.62 : 821.40 = 331.14 : x
  2. Step 2: Convert to fraction form
    547.62/821.40 = 331.14/x
  3. Step 3: Cross multiply
    547.62x = 821.40 × 331.14
  4. Step 4: Simplify right side
    547.62x = 271,998.40
  5. Step 5: Solve for x
    x = 271,998.40/547.62
  6. Step 6: Final answer
    x = 496.69

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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.