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Finding the Fourth Proportional to 353.97, 531.16 and 191.77

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Solution

The fourth proportional to 353.97, 531.16 and 191.77 is: 287.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.97 : 531.16 = 191.77 : x
  2. Step 2: Convert to fraction form
    353.97/531.16 = 191.77/x
  3. Step 3: Cross multiply
    353.97x = 531.16 × 191.77
  4. Step 4: Simplify right side
    353.97x = 101,858.75
  5. Step 5: Solve for x
    x = 101,858.75/353.97
  6. Step 6: Final answer
    x = 287.76

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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.