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Finding the Third Proportional to 398,220 and 843,078

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Solution

The third proportional to 398,220 and 843,078 is: 1,784,894.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,220 : 843,078 = 843,078 : x
  2. Step 2: Convert to fraction form
    398,220/843,078 = 843,078/x
  3. Step 3: Cross multiply
    398,220x = 843,078 × 843,078
  4. Step 4: Simplify right side
    398,220x = 710,780,514,084
  5. Step 5: Solve for x
    x = 710,780,514,084/398,220
  6. Step 6: Final answer
    x = 1,784,894.06

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.