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Finding the Third Proportional to 191,230 and 420,209

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Solution

The third proportional to 191,230 and 420,209 is: 923,367.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,230 : 420,209 = 420,209 : x
  2. Step 2: Convert to fraction form
    191,230/420,209 = 420,209/x
  3. Step 3: Cross multiply
    191,230x = 420,209 × 420,209
  4. Step 4: Simplify right side
    191,230x = 176,575,603,681
  5. Step 5: Solve for x
    x = 176,575,603,681/191,230
  6. Step 6: Final answer
    x = 923,367.69

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.