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Finding the Fourth Proportional to 546.74, 820.21 and 181.43

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Solution

The fourth proportional to 546.74, 820.21 and 181.43 is: 272.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.74 : 820.21 = 181.43 : x
  2. Step 2: Convert to fraction form
    546.74/820.21 = 181.43/x
  3. Step 3: Cross multiply
    546.74x = 820.21 × 181.43
  4. Step 4: Simplify right side
    546.74x = 148,810.70
  5. Step 5: Solve for x
    x = 148,810.70/546.74
  6. Step 6: Final answer
    x = 272.18

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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.