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Finding the Fourth Proportional to 543.44, 815.38 and 269.40

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Solution

The fourth proportional to 543.44, 815.38 and 269.40 is: 404.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.44 : 815.38 = 269.40 : x
  2. Step 2: Convert to fraction form
    543.44/815.38 = 269.40/x
  3. Step 3: Cross multiply
    543.44x = 815.38 × 269.40
  4. Step 4: Simplify right side
    543.44x = 219,663.37
  5. Step 5: Solve for x
    x = 219,663.37/543.44
  6. Step 6: Final answer
    x = 404.21

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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.