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Finding the Third Proportional to 128,604 and 200,268

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Solution

The third proportional to 128,604 and 200,268 is: 311,866.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,604 : 200,268 = 200,268 : x
  2. Step 2: Convert to fraction form
    128,604/200,268 = 200,268/x
  3. Step 3: Cross multiply
    128,604x = 200,268 × 200,268
  4. Step 4: Simplify right side
    128,604x = 40,107,271,824
  5. Step 5: Solve for x
    x = 40,107,271,824/128,604
  6. Step 6: Final answer
    x = 311,866.44

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.