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Finding the Fourth Proportional to 543.48, 815.44 and 269.84

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Solution

The fourth proportional to 543.48, 815.44 and 269.84 is: 404.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.48 : 815.44 = 269.84 : x
  2. Step 2: Convert to fraction form
    543.48/815.44 = 269.84/x
  3. Step 3: Cross multiply
    543.48x = 815.44 × 269.84
  4. Step 4: Simplify right side
    543.48x = 220,038.33
  5. Step 5: Solve for x
    x = 220,038.33/543.48
  6. Step 6: Final answer
    x = 404.87

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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.