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Finding the Third Proportional to 212,876 and 354,779

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Solution

The third proportional to 212,876 and 354,779 is: 591,274.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,876 : 354,779 = 354,779 : x
  2. Step 2: Convert to fraction form
    212,876/354,779 = 354,779/x
  3. Step 3: Cross multiply
    212,876x = 354,779 × 354,779
  4. Step 4: Simplify right side
    212,876x = 125,868,138,841
  5. Step 5: Solve for x
    x = 125,868,138,841/212,876
  6. Step 6: Final answer
    x = 591,274.45

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.