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Finding the Fourth Proportional to 543.96, 815.98 and 219.36

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Solution

The fourth proportional to 543.96, 815.98 and 219.36 is: 329.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.96 : 815.98 = 219.36 : x
  2. Step 2: Convert to fraction form
    543.96/815.98 = 219.36/x
  3. Step 3: Cross multiply
    543.96x = 815.98 × 219.36
  4. Step 4: Simplify right side
    543.96x = 178,993.37
  5. Step 5: Solve for x
    x = 178,993.37/543.96
  6. Step 6: Final answer
    x = 329.06

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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.