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Finding the Third Proportional to 253.88 and 395.63

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Solution

The third proportional to 253.88 and 395.63 is: 616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.88 : 395.63 = 395.63 : x
  2. Step 2: Convert to fraction form
    253.88/395.63 = 395.63/x
  3. Step 3: Cross multiply
    253.88x = 395.63 × 395.63
  4. Step 4: Simplify right side
    253.88x = 156,519.14
  5. Step 5: Solve for x
    x = 156,519.14/253.88
  6. Step 6: Final answer
    x = 616.52

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.