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Finding the Fourth Proportional to 299.80, 413.63 and 201.61

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Solution

The fourth proportional to 299.80, 413.63 and 201.61 is: 278.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.80 : 413.63 = 201.61 : x
  2. Step 2: Convert to fraction form
    299.80/413.63 = 201.61/x
  3. Step 3: Cross multiply
    299.80x = 413.63 × 201.61
  4. Step 4: Simplify right side
    299.80x = 83,393.94
  5. Step 5: Solve for x
    x = 83,393.94/299.80
  6. Step 6: Final answer
    x = 278.16

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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.