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Finding the Third Proportional to 393,626 and 626,640

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Solution

The third proportional to 393,626 and 626,640 is: 997,590.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,626 : 626,640 = 626,640 : x
  2. Step 2: Convert to fraction form
    393,626/626,640 = 626,640/x
  3. Step 3: Cross multiply
    393,626x = 626,640 × 626,640
  4. Step 4: Simplify right side
    393,626x = 392,677,689,600
  5. Step 5: Solve for x
    x = 392,677,689,600/393,626
  6. Step 6: Final answer
    x = 997,590.83

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.