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Finding the Fourth Proportional to 492.22, 679.16 and 295.78

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Solution

The fourth proportional to 492.22, 679.16 and 295.78 is: 408.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.22 : 679.16 = 295.78 : x
  2. Step 2: Convert to fraction form
    492.22/679.16 = 295.78/x
  3. Step 3: Cross multiply
    492.22x = 679.16 × 295.78
  4. Step 4: Simplify right side
    492.22x = 200,881.94
  5. Step 5: Solve for x
    x = 200,881.94/492.22
  6. Step 6: Final answer
    x = 408.11

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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.