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Finding the Fourth Proportional to 352.46, 486.38 and 197.21

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Solution

The fourth proportional to 352.46, 486.38 and 197.21 is: 272.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.46 : 486.38 = 197.21 : x
  2. Step 2: Convert to fraction form
    352.46/486.38 = 197.21/x
  3. Step 3: Cross multiply
    352.46x = 486.38 × 197.21
  4. Step 4: Simplify right side
    352.46x = 95,916.57
  5. Step 5: Solve for x
    x = 95,916.57/352.46
  6. Step 6: Final answer
    x = 272.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.