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Finding the Fourth Proportional to 543.17, 814.81 and 218.54

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Solution

The fourth proportional to 543.17, 814.81 and 218.54 is: 327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.17 : 814.81 = 218.54 : x
  2. Step 2: Convert to fraction form
    543.17/814.81 = 218.54/x
  3. Step 3: Cross multiply
    543.17x = 814.81 × 218.54
  4. Step 4: Simplify right side
    543.17x = 178,070.07
  5. Step 5: Solve for x
    x = 178,070.07/543.17
  6. Step 6: Final answer
    x = 327.83

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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.