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Finding the Third Proportional to 201,711 and 312,318

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Solution

The third proportional to 201,711 and 312,318 is: 483,575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,711 : 312,318 = 312,318 : x
  2. Step 2: Convert to fraction form
    201,711/312,318 = 312,318/x
  3. Step 3: Cross multiply
    201,711x = 312,318 × 312,318
  4. Step 4: Simplify right side
    201,711x = 97,542,533,124
  5. Step 5: Solve for x
    x = 97,542,533,124/201,711
  6. Step 6: Final answer
    x = 483,575.68

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.