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Finding the Fourth Proportional to 547.45, 821.19 and 222.79

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Solution

The fourth proportional to 547.45, 821.19 and 222.79 is: 334.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.45 : 821.19 = 222.79 : x
  2. Step 2: Convert to fraction form
    547.45/821.19 = 222.79/x
  3. Step 3: Cross multiply
    547.45x = 821.19 × 222.79
  4. Step 4: Simplify right side
    547.45x = 182,952.92
  5. Step 5: Solve for x
    x = 182,952.92/547.45
  6. Step 6: Final answer
    x = 334.19

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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.