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Finding the Third Proportional to 389,290 and 836,779

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Solution

The third proportional to 389,290 and 836,779 is: 1,798,656.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,290 : 836,779 = 836,779 : x
  2. Step 2: Convert to fraction form
    389,290/836,779 = 836,779/x
  3. Step 3: Cross multiply
    389,290x = 836,779 × 836,779
  4. Step 4: Simplify right side
    389,290x = 700,199,094,841
  5. Step 5: Solve for x
    x = 700,199,094,841/389,290
  6. Step 6: Final answer
    x = 1,798,656.77

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.