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Finding the Third Proportional to 918,318 and 1,999,278

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Solution

The third proportional to 918,318 and 1,999,278 is: 4,352,645.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,318 : 1,999,278 = 1,999,278 : x
  2. Step 2: Convert to fraction form
    918,318/1,999,278 = 1,999,278/x
  3. Step 3: Cross multiply
    918,318x = 1,999,278 × 1,999,278
  4. Step 4: Simplify right side
    918,318x = 3,997,112,521,284
  5. Step 5: Solve for x
    x = 3,997,112,521,284/918,318
  6. Step 6: Final answer
    x = 4,352,645.29

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.