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Finding the Fourth Proportional to 492.69, 739.28 and 298.09

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Solution

The fourth proportional to 492.69, 739.28 and 298.09 is: 447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.69 : 739.28 = 298.09 : x
  2. Step 2: Convert to fraction form
    492.69/739.28 = 298.09/x
  3. Step 3: Cross multiply
    492.69x = 739.28 × 298.09
  4. Step 4: Simplify right side
    492.69x = 220,370.87
  5. Step 5: Solve for x
    x = 220,370.87/492.69
  6. Step 6: Final answer
    x = 447.28

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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.