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Finding the Third Proportional to 198,640,866 and 427,640,096

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Solution

The third proportional to 198,640,866 and 427,640,096 is: 920,636,601.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,640,866 : 427,640,096 = 427,640,096 : x
  2. Step 2: Convert to fraction form
    198,640,866/427,640,096 = 427,640,096/x
  3. Step 3: Cross multiply
    198,640,866x = 427,640,096 × 427,640,096
  4. Step 4: Simplify right side
    198,640,866x = 182,876,051,706,889,216
  5. Step 5: Solve for x
    x = 182,876,051,706,889,216/198,640,866
  6. Step 6: Final answer
    x = 920,636,601.07

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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.