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Finding the Third Proportional to 292,884 and 639,480

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Solution

The third proportional to 292,884 and 639,480 is: 1,396,234.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,884 : 639,480 = 639,480 : x
  2. Step 2: Convert to fraction form
    292,884/639,480 = 639,480/x
  3. Step 3: Cross multiply
    292,884x = 639,480 × 639,480
  4. Step 4: Simplify right side
    292,884x = 408,934,670,400
  5. Step 5: Solve for x
    x = 408,934,670,400/292,884
  6. Step 6: Final answer
    x = 1,396,234.24

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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.