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Finding the Fourth Proportional to 423.02, 634.46 and 191.92

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Solution

The fourth proportional to 423.02, 634.46 and 191.92 is: 287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.02 : 634.46 = 191.92 : x
  2. Step 2: Convert to fraction form
    423.02/634.46 = 191.92/x
  3. Step 3: Cross multiply
    423.02x = 634.46 × 191.92
  4. Step 4: Simplify right side
    423.02x = 121,765.56
  5. Step 5: Solve for x
    x = 121,765.56/423.02
  6. Step 6: Final answer
    x = 287.85

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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.