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Finding the Fourth Proportional to 547.79, 821.72 and 163.07

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Solution

The fourth proportional to 547.79, 821.72 and 163.07 is: 244.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.79 : 821.72 = 163.07 : x
  2. Step 2: Convert to fraction form
    547.79/821.72 = 163.07/x
  3. Step 3: Cross multiply
    547.79x = 821.72 × 163.07
  4. Step 4: Simplify right side
    547.79x = 133,997.88
  5. Step 5: Solve for x
    x = 133,997.88/547.79
  6. Step 6: Final answer
    x = 244.62

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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.