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Finding the Third Proportional to 187,790 and 405,070

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Solution

The third proportional to 187,790 and 405,070 is: 873,751.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,790 : 405,070 = 405,070 : x
  2. Step 2: Convert to fraction form
    187,790/405,070 = 405,070/x
  3. Step 3: Cross multiply
    187,790x = 405,070 × 405,070
  4. Step 4: Simplify right side
    187,790x = 164,081,704,900
  5. Step 5: Solve for x
    x = 164,081,704,900/187,790
  6. Step 6: Final answer
    x = 873,751.02

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.