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Finding the Third Proportional to 254.72 and 400.36

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Solution

The third proportional to 254.72 and 400.36 is: 629.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.72 : 400.36 = 400.36 : x
  2. Step 2: Convert to fraction form
    254.72/400.36 = 400.36/x
  3. Step 3: Cross multiply
    254.72x = 400.36 × 400.36
  4. Step 4: Simplify right side
    254.72x = 160,287.63
  5. Step 5: Solve for x
    x = 160,287.63/254.72
  6. Step 6: Final answer
    x = 629.27

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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.