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Finding the Third Proportional to 338 and 485.25

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Solution

The third proportional to 338 and 485.25 is: 696.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    338 : 485.25 = 485.25 : x
  2. Step 2: Convert to fraction form
    338/485.25 = 485.25/x
  3. Step 3: Cross multiply
    338x = 485.25 × 485.25
  4. Step 4: Simplify right side
    338x = 235,467.56
  5. Step 5: Solve for x
    x = 235,467.56/338
  6. Step 6: Final answer
    x = 696.65

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.