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Finding the Third Proportional to 212,819.50 and 435,480.50

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Solution

The third proportional to 212,819.50 and 435,480.50 is: 891,099.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,819.50 : 435,480.50 = 435,480.50 : x
  2. Step 2: Convert to fraction form
    212,819.50/435,480.50 = 435,480.50/x
  3. Step 3: Cross multiply
    212,819.50x = 435,480.50 × 435,480.50
  4. Step 4: Simplify right side
    212,819.50x = 189,643,265,880.25
  5. Step 5: Solve for x
    x = 189,643,265,880.25/212,819.50
  6. Step 6: Final answer
    x = 891,099.10

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.