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Finding the Third Proportional to 319,119 and 690,654

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Solution

The third proportional to 319,119 and 690,654 is: 1,494,749.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,119 : 690,654 = 690,654 : x
  2. Step 2: Convert to fraction form
    319,119/690,654 = 690,654/x
  3. Step 3: Cross multiply
    319,119x = 690,654 × 690,654
  4. Step 4: Simplify right side
    319,119x = 477,002,947,716
  5. Step 5: Solve for x
    x = 477,002,947,716/319,119
  6. Step 6: Final answer
    x = 1,494,749.44

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.