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Finding the Fourth Proportional to 253.28, 379.80 and 109.04

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Solution

The fourth proportional to 253.28, 379.80 and 109.04 is: 163.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.28 : 379.80 = 109.04 : x
  2. Step 2: Convert to fraction form
    253.28/379.80 = 109.04/x
  3. Step 3: Cross multiply
    253.28x = 379.80 × 109.04
  4. Step 4: Simplify right side
    253.28x = 41,413.39
  5. Step 5: Solve for x
    x = 41,413.39/253.28
  6. Step 6: Final answer
    x = 163.51

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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.