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Finding the Third Proportional to 397,319 and 865,570

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Solution

The third proportional to 397,319 and 865,570 is: 1,885,667.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,319 : 865,570 = 865,570 : x
  2. Step 2: Convert to fraction form
    397,319/865,570 = 865,570/x
  3. Step 3: Cross multiply
    397,319x = 865,570 × 865,570
  4. Step 4: Simplify right side
    397,319x = 749,211,424,900
  5. Step 5: Solve for x
    x = 749,211,424,900/397,319
  6. Step 6: Final answer
    x = 1,885,667.25

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.