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Finding the Third Proportional to 295,406 and 644,278

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Solution

The third proportional to 295,406 and 644,278 is: 1,405,164.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,406 : 644,278 = 644,278 : x
  2. Step 2: Convert to fraction form
    295,406/644,278 = 644,278/x
  3. Step 3: Cross multiply
    295,406x = 644,278 × 644,278
  4. Step 4: Simplify right side
    295,406x = 415,094,141,284
  5. Step 5: Solve for x
    x = 415,094,141,284/295,406
  6. Step 6: Final answer
    x = 1,405,164.90

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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.