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Finding the Third Proportional to 187,720 and 408,488

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Solution

The third proportional to 187,720 and 408,488 is: 888,890.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,720 : 408,488 = 408,488 : x
  2. Step 2: Convert to fraction form
    187,720/408,488 = 408,488/x
  3. Step 3: Cross multiply
    187,720x = 408,488 × 408,488
  4. Step 4: Simplify right side
    187,720x = 166,862,446,144
  5. Step 5: Solve for x
    x = 166,862,446,144/187,720
  6. Step 6: Final answer
    x = 888,890.08

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.