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Finding the Third Proportional to 187,308 and 405,720

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Solution

The third proportional to 187,308 and 405,720 is: 878,813.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,308 : 405,720 = 405,720 : x
  2. Step 2: Convert to fraction form
    187,308/405,720 = 405,720/x
  3. Step 3: Cross multiply
    187,308x = 405,720 × 405,720
  4. Step 4: Simplify right side
    187,308x = 164,608,718,400
  5. Step 5: Solve for x
    x = 164,608,718,400/187,308
  6. Step 6: Final answer
    x = 878,813.07

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.