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Finding the Fourth Proportional to 352.34, 528.61 and 108.90

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Solution

The fourth proportional to 352.34, 528.61 and 108.90 is: 163.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.34 : 528.61 = 108.90 : x
  2. Step 2: Convert to fraction form
    352.34/528.61 = 108.90/x
  3. Step 3: Cross multiply
    352.34x = 528.61 × 108.90
  4. Step 4: Simplify right side
    352.34x = 57,565.63
  5. Step 5: Solve for x
    x = 57,565.63/352.34
  6. Step 6: Final answer
    x = 163.38

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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.