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Finding the Fourth Proportional to 352.26, 528.78 and 206.18

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Solution

The fourth proportional to 352.26, 528.78 and 206.18 is: 309.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.26 : 528.78 = 206.18 : x
  2. Step 2: Convert to fraction form
    352.26/528.78 = 206.18/x
  3. Step 3: Cross multiply
    352.26x = 528.78 × 206.18
  4. Step 4: Simplify right side
    352.26x = 109,021.22
  5. Step 5: Solve for x
    x = 109,021.22/352.26
  6. Step 6: Final answer
    x = 309.49

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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.