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Finding the Fourth Proportional to 352.86, 486.95 and 197.61

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Solution

The fourth proportional to 352.86, 486.95 and 197.61 is: 272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.86 : 486.95 = 197.61 : x
  2. Step 2: Convert to fraction form
    352.86/486.95 = 197.61/x
  3. Step 3: Cross multiply
    352.86x = 486.95 × 197.61
  4. Step 4: Simplify right side
    352.86x = 96,225.20
  5. Step 5: Solve for x
    x = 96,225.20/352.86
  6. Step 6: Final answer
    x = 272.70

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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.