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Finding the Third Proportional to 309,679 and 436,080

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Solution

The third proportional to 309,679 and 436,080 is: 614,073.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,679 : 436,080 = 436,080 : x
  2. Step 2: Convert to fraction form
    309,679/436,080 = 436,080/x
  3. Step 3: Cross multiply
    309,679x = 436,080 × 436,080
  4. Step 4: Simplify right side
    309,679x = 190,165,766,400
  5. Step 5: Solve for x
    x = 190,165,766,400/309,679
  6. Step 6: Final answer
    x = 614,073.82

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.