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Finding the Third Proportional to 309,276 and 659,376

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Solution

The third proportional to 309,276 and 659,376 is: 1,405,788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,276 : 659,376 = 659,376 : x
  2. Step 2: Convert to fraction form
    309,276/659,376 = 659,376/x
  3. Step 3: Cross multiply
    309,276x = 659,376 × 659,376
  4. Step 4: Simplify right side
    309,276x = 434,776,709,376
  5. Step 5: Solve for x
    x = 434,776,709,376/309,276
  6. Step 6: Final answer
    x = 1,405,788.71

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.