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Finding the Third Proportional to 318,564 and 684,354

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Solution

The third proportional to 318,564 and 684,354 is: 1,470,161.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,564 : 684,354 = 684,354 : x
  2. Step 2: Convert to fraction form
    318,564/684,354 = 684,354/x
  3. Step 3: Cross multiply
    318,564x = 684,354 × 684,354
  4. Step 4: Simplify right side
    318,564x = 468,340,397,316
  5. Step 5: Solve for x
    x = 468,340,397,316/318,564
  6. Step 6: Final answer
    x = 1,470,161.09

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.