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Finding the Fourth Proportional to 351.96, 527.79 and 189.61

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Solution

The fourth proportional to 351.96, 527.79 and 189.61 is: 284.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.96 : 527.79 = 189.61 : x
  2. Step 2: Convert to fraction form
    351.96/527.79 = 189.61/x
  3. Step 3: Cross multiply
    351.96x = 527.79 × 189.61
  4. Step 4: Simplify right side
    351.96x = 100,074.26
  5. Step 5: Solve for x
    x = 100,074.26/351.96
  6. Step 6: Final answer
    x = 284.33

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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.