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Finding the Third Proportional to 437,490 and 685,394

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Solution

The third proportional to 437,490 and 685,394 is: 1,073,772.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,490 : 685,394 = 685,394 : x
  2. Step 2: Convert to fraction form
    437,490/685,394 = 685,394/x
  3. Step 3: Cross multiply
    437,490x = 685,394 × 685,394
  4. Step 4: Simplify right side
    437,490x = 469,764,935,236
  5. Step 5: Solve for x
    x = 469,764,935,236/437,490
  6. Step 6: Final answer
    x = 1,073,772.97

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.