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Finding the Third Proportional to 205.88 and 320.63

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Solution

The third proportional to 205.88 and 320.63 is: 499.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.88 : 320.63 = 320.63 : x
  2. Step 2: Convert to fraction form
    205.88/320.63 = 320.63/x
  3. Step 3: Cross multiply
    205.88x = 320.63 × 320.63
  4. Step 4: Simplify right side
    205.88x = 102,800.39
  5. Step 5: Solve for x
    x = 102,800.39/205.88
  6. Step 6: Final answer
    x = 499.33

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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.