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Finding the Third Proportional to 407,826 and 620,379

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Solution

The third proportional to 407,826 and 620,379 is: 943,711.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,826 : 620,379 = 620,379 : x
  2. Step 2: Convert to fraction form
    407,826/620,379 = 620,379/x
  3. Step 3: Cross multiply
    407,826x = 620,379 × 620,379
  4. Step 4: Simplify right side
    407,826x = 384,870,103,641
  5. Step 5: Solve for x
    x = 384,870,103,641/407,826
  6. Step 6: Final answer
    x = 943,711.54

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.