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Finding the Third Proportional to 311,939 and 434,623

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Solution

The third proportional to 311,939 and 434,623 is: 605,557.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,939 : 434,623 = 434,623 : x
  2. Step 2: Convert to fraction form
    311,939/434,623 = 434,623/x
  3. Step 3: Cross multiply
    311,939x = 434,623 × 434,623
  4. Step 4: Simplify right side
    311,939x = 188,897,152,129
  5. Step 5: Solve for x
    x = 188,897,152,129/311,939
  6. Step 6: Final answer
    x = 605,557.98

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.