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Finding the Third Proportional to 389,915,356 and 856,362,608

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Solution

The third proportional to 389,915,356 and 856,362,608 is: 1,880,810,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,915,356 : 856,362,608 = 856,362,608 : x
  2. Step 2: Convert to fraction form
    389,915,356/856,362,608 = 856,362,608/x
  3. Step 3: Cross multiply
    389,915,356x = 856,362,608 × 856,362,608
  4. Step 4: Simplify right side
    389,915,356x = 733,356,916,380,561,664
  5. Step 5: Solve for x
    x = 733,356,916,380,561,664/389,915,356
  6. Step 6: Final answer
    x = 1,880,810,553.10

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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.