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Finding the Third Proportional to 263.44 and 398.72

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Solution

The third proportional to 263.44 and 398.72 is: 603.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.44 : 398.72 = 398.72 : x
  2. Step 2: Convert to fraction form
    263.44/398.72 = 398.72/x
  3. Step 3: Cross multiply
    263.44x = 398.72 × 398.72
  4. Step 4: Simplify right side
    263.44x = 158,976.64
  5. Step 5: Solve for x
    x = 158,976.64/263.44
  6. Step 6: Final answer
    x = 603.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.