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Finding the Fourth Proportional to 492.26, 679.30 and 295.80

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Solution

The fourth proportional to 492.26, 679.30 and 295.80 is: 408.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.26 : 679.30 = 295.80 : x
  2. Step 2: Convert to fraction form
    492.26/679.30 = 295.80/x
  3. Step 3: Cross multiply
    492.26x = 679.30 × 295.80
  4. Step 4: Simplify right side
    492.26x = 200,936.94
  5. Step 5: Solve for x
    x = 200,936.94/492.26
  6. Step 6: Final answer
    x = 408.19

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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.