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Finding the Third Proportional to 420,333 and 669,156

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Solution

The third proportional to 420,333 and 669,156 is: 1,065,273.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,333 : 669,156 = 669,156 : x
  2. Step 2: Convert to fraction form
    420,333/669,156 = 669,156/x
  3. Step 3: Cross multiply
    420,333x = 669,156 × 669,156
  4. Step 4: Simplify right side
    420,333x = 447,769,752,336
  5. Step 5: Solve for x
    x = 447,769,752,336/420,333
  6. Step 6: Final answer
    x = 1,065,273.85

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.