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Finding the Third Proportional to 190,447 and 407,131

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Solution

The third proportional to 190,447 and 407,131 is: 870,350.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,447 : 407,131 = 407,131 : x
  2. Step 2: Convert to fraction form
    190,447/407,131 = 407,131/x
  3. Step 3: Cross multiply
    190,447x = 407,131 × 407,131
  4. Step 4: Simplify right side
    190,447x = 165,755,651,161
  5. Step 5: Solve for x
    x = 165,755,651,161/190,447
  6. Step 6: Final answer
    x = 870,350.55

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.