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Finding the Fourth Proportional to 352.15, 485.96 and 194.78

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Solution

The fourth proportional to 352.15, 485.96 and 194.78 is: 268.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.15 : 485.96 = 194.78 : x
  2. Step 2: Convert to fraction form
    352.15/485.96 = 194.78/x
  3. Step 3: Cross multiply
    352.15x = 485.96 × 194.78
  4. Step 4: Simplify right side
    352.15x = 94,655.29
  5. Step 5: Solve for x
    x = 94,655.29/352.15
  6. Step 6: Final answer
    x = 268.79

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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.