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Finding the Fourth Proportional to 325.64, 488.56 and 109.20

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Solution

The fourth proportional to 325.64, 488.56 and 109.20 is: 163.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.64 : 488.56 = 109.20 : x
  2. Step 2: Convert to fraction form
    325.64/488.56 = 109.20/x
  3. Step 3: Cross multiply
    325.64x = 488.56 × 109.20
  4. Step 4: Simplify right side
    325.64x = 53,350.75
  5. Step 5: Solve for x
    x = 53,350.75/325.64
  6. Step 6: Final answer
    x = 163.83

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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.