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Finding the Fourth Proportional to 381.54, 571.23 and 273

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Solution

The fourth proportional to 381.54, 571.23 and 273 is: 408.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.54 : 571.23 = 273 : x
  2. Step 2: Convert to fraction form
    381.54/571.23 = 273/x
  3. Step 3: Cross multiply
    381.54x = 571.23 × 273
  4. Step 4: Simplify right side
    381.54x = 155,945.79
  5. Step 5: Solve for x
    x = 155,945.79/381.54
  6. Step 6: Final answer
    x = 408.73

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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.