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Finding the Fourth Proportional to 207,912.20, 311,212.20 and 201,351.20

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Solution

The fourth proportional to 207,912.20, 311,212.20 and 201,351.20 is: 301,391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,912.20 : 311,212.20 = 201,351.20 : x
  2. Step 2: Convert to fraction form
    207,912.20/311,212.20 = 201,351.20/x
  3. Step 3: Cross multiply
    207,912.20x = 311,212.20 × 201,351.20
  4. Step 4: Simplify right side
    207,912.20x = 62,662,949,924.64
  5. Step 5: Solve for x
    x = 62,662,949,924.64/207,912.20
  6. Step 6: Final answer
    x = 301,391.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.