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Finding the Fourth Proportional to 548.47, 756.91 and 299.78

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Solution

The fourth proportional to 548.47, 756.91 and 299.78 is: 413.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.47 : 756.91 = 299.78 : x
  2. Step 2: Convert to fraction form
    548.47/756.91 = 299.78/x
  3. Step 3: Cross multiply
    548.47x = 756.91 × 299.78
  4. Step 4: Simplify right side
    548.47x = 226,910.17
  5. Step 5: Solve for x
    x = 226,910.17/548.47
  6. Step 6: Final answer
    x = 413.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.