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Finding the Third Proportional to 420,563,991 and 920,410,458

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Solution

The third proportional to 420,563,991 and 920,410,458 is: 2,014,331,776.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,563,991 : 920,410,458 = 920,410,458 : x
  2. Step 2: Convert to fraction form
    420,563,991/920,410,458 = 920,410,458/x
  3. Step 3: Cross multiply
    420,563,991x = 920,410,458 × 920,410,458
  4. Step 4: Simplify right side
    420,563,991x = 847,155,411,195,769,728
  5. Step 5: Solve for x
    x = 847,155,411,195,769,728/420,563,991
  6. Step 6: Final answer
    x = 2,014,331,776.67

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.