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Finding the Fourth Proportional to 547, 820.42 and 181.76

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Solution

The fourth proportional to 547, 820.42 and 181.76 is: 272.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    547 : 820.42 = 181.76 : x
  2. Step 2: Convert to fraction form
    547/820.42 = 181.76/x
  3. Step 3: Cross multiply
    547x = 820.42 × 181.76
  4. Step 4: Simplify right side
    547x = 149,119.54
  5. Step 5: Solve for x
    x = 149,119.54/547
  6. Step 6: Final answer
    x = 272.61

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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.