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Finding the Fourth Proportional to 496.27, 684.86 and 275.21

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Solution

The fourth proportional to 496.27, 684.86 and 275.21 is: 379.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.27 : 684.86 = 275.21 : x
  2. Step 2: Convert to fraction form
    496.27/684.86 = 275.21/x
  3. Step 3: Cross multiply
    496.27x = 684.86 × 275.21
  4. Step 4: Simplify right side
    496.27x = 188,478.09
  5. Step 5: Solve for x
    x = 188,478.09/496.27
  6. Step 6: Final answer
    x = 379.79

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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.