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Finding the Fourth Proportional to 543.29, 814.39 and 218.41

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Solution

The fourth proportional to 543.29, 814.39 and 218.41 is: 327.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.29 : 814.39 = 218.41 : x
  2. Step 2: Convert to fraction form
    543.29/814.39 = 218.41/x
  3. Step 3: Cross multiply
    543.29x = 814.39 × 218.41
  4. Step 4: Simplify right side
    543.29x = 177,868.34
  5. Step 5: Solve for x
    x = 177,868.34/543.29
  6. Step 6: Final answer
    x = 327.39

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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.