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Finding the Fourth Proportional to 325.76, 488.57 and 109.28

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Solution

The fourth proportional to 325.76, 488.57 and 109.28 is: 163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.76 : 488.57 = 109.28 : x
  2. Step 2: Convert to fraction form
    325.76/488.57 = 109.28/x
  3. Step 3: Cross multiply
    325.76x = 488.57 × 109.28
  4. Step 4: Simplify right side
    325.76x = 53,391.60
  5. Step 5: Solve for x
    x = 53,391.60/325.76
  6. Step 6: Final answer
    x = 163.90

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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.