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Finding the Third Proportional to 306,800 and 659,140

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Solution

The third proportional to 306,800 and 659,140 is: 1,416,119.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,800 : 659,140 = 659,140 : x
  2. Step 2: Convert to fraction form
    306,800/659,140 = 659,140/x
  3. Step 3: Cross multiply
    306,800x = 659,140 × 659,140
  4. Step 4: Simplify right side
    306,800x = 434,465,539,600
  5. Step 5: Solve for x
    x = 434,465,539,600/306,800
  6. Step 6: Final answer
    x = 1,416,119.75

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.