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Finding the Third Proportional to 187,778 and 388,678

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Solution

The third proportional to 187,778 and 388,678 is: 804,516.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,778 : 388,678 = 388,678 : x
  2. Step 2: Convert to fraction form
    187,778/388,678 = 388,678/x
  3. Step 3: Cross multiply
    187,778x = 388,678 × 388,678
  4. Step 4: Simplify right side
    187,778x = 151,070,587,684
  5. Step 5: Solve for x
    x = 151,070,587,684/187,778
  6. Step 6: Final answer
    x = 804,516.97

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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.