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Finding the Third Proportional to 640.83 and 995.63

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Solution

The third proportional to 640.83 and 995.63 is: 1,546.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.83 : 995.63 = 995.63 : x
  2. Step 2: Convert to fraction form
    640.83/995.63 = 995.63/x
  3. Step 3: Cross multiply
    640.83x = 995.63 × 995.63
  4. Step 4: Simplify right side
    640.83x = 991,269.14
  5. Step 5: Solve for x
    x = 991,269.14/640.83
  6. Step 6: Final answer
    x = 1,546.86

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.