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Finding the Third Proportional to 255,790 and 401,272

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Solution

The third proportional to 255,790 and 401,272 is: 629,497.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,790 : 401,272 = 401,272 : x
  2. Step 2: Convert to fraction form
    255,790/401,272 = 401,272/x
  3. Step 3: Cross multiply
    255,790x = 401,272 × 401,272
  4. Step 4: Simplify right side
    255,790x = 161,019,217,984
  5. Step 5: Solve for x
    x = 161,019,217,984/255,790
  6. Step 6: Final answer
    x = 629,497.71

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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.