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Finding the Third Proportional to 409,556 and 641,072

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Solution

The third proportional to 409,556 and 641,072 is: 1,003,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,556 : 641,072 = 641,072 : x
  2. Step 2: Convert to fraction form
    409,556/641,072 = 641,072/x
  3. Step 3: Cross multiply
    409,556x = 641,072 × 641,072
  4. Step 4: Simplify right side
    409,556x = 410,973,309,184
  5. Step 5: Solve for x
    x = 410,973,309,184/409,556
  6. Step 6: Final answer
    x = 1,003,460.60

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.