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Finding the Fourth Proportional to 352.15, 528.68 and 271.05

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Solution

The fourth proportional to 352.15, 528.68 and 271.05 is: 406.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.15 : 528.68 = 271.05 : x
  2. Step 2: Convert to fraction form
    352.15/528.68 = 271.05/x
  3. Step 3: Cross multiply
    352.15x = 528.68 × 271.05
  4. Step 4: Simplify right side
    352.15x = 143,295.88
  5. Step 5: Solve for x
    x = 143,295.88/352.15
  6. Step 6: Final answer
    x = 406.92

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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.