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Finding the Fourth Proportional to 547.12, 821.18 and 273.79

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Solution

The fourth proportional to 547.12, 821.18 and 273.79 is: 410.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.12 : 821.18 = 273.79 : x
  2. Step 2: Convert to fraction form
    547.12/821.18 = 273.79/x
  3. Step 3: Cross multiply
    547.12x = 821.18 × 273.79
  4. Step 4: Simplify right side
    547.12x = 224,830.87
  5. Step 5: Solve for x
    x = 224,830.87/547.12
  6. Step 6: Final answer
    x = 410.94

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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.