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Finding the Third Proportional to 163.69 and 256.69

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Solution

The third proportional to 163.69 and 256.69 is: 402.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.69 : 256.69 = 256.69 : x
  2. Step 2: Convert to fraction form
    163.69/256.69 = 256.69/x
  3. Step 3: Cross multiply
    163.69x = 256.69 × 256.69
  4. Step 4: Simplify right side
    163.69x = 65,888.47
  5. Step 5: Solve for x
    x = 65,888.47/163.69
  6. Step 6: Final answer
    x = 402.53

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.