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Finding the Third Proportional to 169.44 and 256.56

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Solution

The third proportional to 169.44 and 256.56 is: 388.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    169.44 : 256.56 = 256.56 : x
  2. Step 2: Convert to fraction form
    169.44/256.56 = 256.56/x
  3. Step 3: Cross multiply
    169.44x = 256.56 × 256.56
  4. Step 4: Simplify right side
    169.44x = 65,824.32
  5. Step 5: Solve for x
    x = 65,824.32/169.44
  6. Step 6: Final answer
    x = 388.49

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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.