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Finding the Third Proportional to 391,840 and 800,284

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Solution

The third proportional to 391,840 and 800,284 is: 1,634,479.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,840 : 800,284 = 800,284 : x
  2. Step 2: Convert to fraction form
    391,840/800,284 = 800,284/x
  3. Step 3: Cross multiply
    391,840x = 800,284 × 800,284
  4. Step 4: Simplify right side
    391,840x = 640,454,480,656
  5. Step 5: Solve for x
    x = 640,454,480,656/391,840
  6. Step 6: Final answer
    x = 1,634,479.59

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Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.