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Finding the Fourth Proportional to 496.26, 684.84 and 275.20

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Solution

The fourth proportional to 496.26, 684.84 and 275.20 is: 379.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.26 : 684.84 = 275.20 : x
  2. Step 2: Convert to fraction form
    496.26/684.84 = 275.20/x
  3. Step 3: Cross multiply
    496.26x = 684.84 × 275.20
  4. Step 4: Simplify right side
    496.26x = 188,467.97
  5. Step 5: Solve for x
    x = 188,467.97/496.26
  6. Step 6: Final answer
    x = 379.78

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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.