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Finding the Fourth Proportional to 352.42, 528.63 and 108.91

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Solution

The fourth proportional to 352.42, 528.63 and 108.91 is: 163.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.42 : 528.63 = 108.91 : x
  2. Step 2: Convert to fraction form
    352.42/528.63 = 108.91/x
  3. Step 3: Cross multiply
    352.42x = 528.63 × 108.91
  4. Step 4: Simplify right side
    352.42x = 57,573.35
  5. Step 5: Solve for x
    x = 57,573.35/352.42
  6. Step 6: Final answer
    x = 163.37

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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.