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Finding the Third Proportional to 679.88 and 995.81

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Solution

The third proportional to 679.88 and 995.81 is: 1,458.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.88 : 995.81 = 995.81 : x
  2. Step 2: Convert to fraction form
    679.88/995.81 = 995.81/x
  3. Step 3: Cross multiply
    679.88x = 995.81 × 995.81
  4. Step 4: Simplify right side
    679.88x = 991,642.54
  5. Step 5: Solve for x
    x = 991,642.54/679.88
  6. Step 6: Final answer
    x = 1,458.57

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.