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Finding the Third Proportional to 387,672 and 822,316

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Solution

The third proportional to 387,672 and 822,316 is: 1,744,267.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,672 : 822,316 = 822,316 : x
  2. Step 2: Convert to fraction form
    387,672/822,316 = 822,316/x
  3. Step 3: Cross multiply
    387,672x = 822,316 × 822,316
  4. Step 4: Simplify right side
    387,672x = 676,203,603,856
  5. Step 5: Solve for x
    x = 676,203,603,856/387,672
  6. Step 6: Final answer
    x = 1,744,267.33

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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.