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Finding the Fourth Proportional to 299.28, 413.18 and 188.81

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Solution

The fourth proportional to 299.28, 413.18 and 188.81 is: 260.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.28 : 413.18 = 188.81 : x
  2. Step 2: Convert to fraction form
    299.28/413.18 = 188.81/x
  3. Step 3: Cross multiply
    299.28x = 413.18 × 188.81
  4. Step 4: Simplify right side
    299.28x = 78,009.51
  5. Step 5: Solve for x
    x = 78,009.51/299.28
  6. Step 6: Final answer
    x = 260.66

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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.