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Finding the Fourth Proportional to 620,704.20, 930,969.90 and 200,022.60

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Solution

The fourth proportional to 620,704.20, 930,969.90 and 200,022.60 is: 300,006.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,704.20 : 930,969.90 = 200,022.60 : x
  2. Step 2: Convert to fraction form
    620,704.20/930,969.90 = 200,022.60/x
  3. Step 3: Cross multiply
    620,704.20x = 930,969.90 × 200,022.60
  4. Step 4: Simplify right side
    620,704.20x = 186,215,019,919.74
  5. Step 5: Solve for x
    x = 186,215,019,919.74/620,704.20
  6. Step 6: Final answer
    x = 300,006.06

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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.