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Finding the Third Proportional to 640.63 and 995.13

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Solution

The third proportional to 640.63 and 995.13 is: 1,545.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.63 : 995.13 = 995.13 : x
  2. Step 2: Convert to fraction form
    640.63/995.13 = 995.13/x
  3. Step 3: Cross multiply
    640.63x = 995.13 × 995.13
  4. Step 4: Simplify right side
    640.63x = 990,273.77
  5. Step 5: Solve for x
    x = 990,273.77/640.63
  6. Step 6: Final answer
    x = 1,545.79

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