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Finding the Fourth Proportional to 352.17, 528.32 and 121.09

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Solution

The fourth proportional to 352.17, 528.32 and 121.09 is: 181.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.17 : 528.32 = 121.09 : x
  2. Step 2: Convert to fraction form
    352.17/528.32 = 121.09/x
  3. Step 3: Cross multiply
    352.17x = 528.32 × 121.09
  4. Step 4: Simplify right side
    352.17x = 63,974.27
  5. Step 5: Solve for x
    x = 63,974.27/352.17
  6. Step 6: Final answer
    x = 181.66

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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.