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Finding the Fourth Proportional to 547.31, 820.64 and 273.78

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Solution

The fourth proportional to 547.31, 820.64 and 273.78 is: 410.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.31 : 820.64 = 273.78 : x
  2. Step 2: Convert to fraction form
    547.31/820.64 = 273.78/x
  3. Step 3: Cross multiply
    547.31x = 820.64 × 273.78
  4. Step 4: Simplify right side
    547.31x = 224,675.50
  5. Step 5: Solve for x
    x = 224,675.50/547.31
  6. Step 6: Final answer
    x = 410.51

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Double scale
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Similar ratio
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1.5x scale

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.