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Finding the Third Proportional to 178,419 and 384,690

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Solution

The third proportional to 178,419 and 384,690 is: 829,431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,419 : 384,690 = 384,690 : x
  2. Step 2: Convert to fraction form
    178,419/384,690 = 384,690/x
  3. Step 3: Cross multiply
    178,419x = 384,690 × 384,690
  4. Step 4: Simplify right side
    178,419x = 147,986,396,100
  5. Step 5: Solve for x
    x = 147,986,396,100/178,419
  6. Step 6: Final answer
    x = 829,431.82

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.