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Finding the Third Proportional to 398,169 and 859,680

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Solution

The third proportional to 398,169 and 859,680 is: 1,856,120.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,169 : 859,680 = 859,680 : x
  2. Step 2: Convert to fraction form
    398,169/859,680 = 859,680/x
  3. Step 3: Cross multiply
    398,169x = 859,680 × 859,680
  4. Step 4: Simplify right side
    398,169x = 739,049,702,400
  5. Step 5: Solve for x
    x = 739,049,702,400/398,169
  6. Step 6: Final answer
    x = 1,856,120.65

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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.