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Finding the Fourth Proportional to 352.68, 486.72 and 197.43

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Solution

The fourth proportional to 352.68, 486.72 and 197.43 is: 272.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.68 : 486.72 = 197.43 : x
  2. Step 2: Convert to fraction form
    352.68/486.72 = 197.43/x
  3. Step 3: Cross multiply
    352.68x = 486.72 × 197.43
  4. Step 4: Simplify right side
    352.68x = 96,093.13
  5. Step 5: Solve for x
    x = 96,093.13/352.68
  6. Step 6: Final answer
    x = 272.47

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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.