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Finding the Fourth Proportional to 299.29, 413.17 and 225.78

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Solution

The fourth proportional to 299.29, 413.17 and 225.78 is: 311.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.29 : 413.17 = 225.78 : x
  2. Step 2: Convert to fraction form
    299.29/413.17 = 225.78/x
  3. Step 3: Cross multiply
    299.29x = 413.17 × 225.78
  4. Step 4: Simplify right side
    299.29x = 93,284.77
  5. Step 5: Solve for x
    x = 93,284.77/299.29
  6. Step 6: Final answer
    x = 311.69

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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.