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Finding the Third Proportional to 187,715 and 388,739

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Solution

The third proportional to 187,715 and 388,739 is: 805,039.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,715 : 388,739 = 388,739 : x
  2. Step 2: Convert to fraction form
    187,715/388,739 = 388,739/x
  3. Step 3: Cross multiply
    187,715x = 388,739 × 388,739
  4. Step 4: Simplify right side
    187,715x = 151,118,010,121
  5. Step 5: Solve for x
    x = 151,118,010,121/187,715
  6. Step 6: Final answer
    x = 805,039.61

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.