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Finding the Fourth Proportional to 620,715.20, 930,986.40 and 200,033.60

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Solution

The fourth proportional to 620,715.20, 930,986.40 and 200,033.60 is: 300,022.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,715.20 : 930,986.40 = 200,033.60 : x
  2. Step 2: Convert to fraction form
    620,715.20/930,986.40 = 200,033.60/x
  3. Step 3: Cross multiply
    620,715.20x = 930,986.40 × 200,033.60
  4. Step 4: Simplify right side
    620,715.20x = 186,228,561,143.04
  5. Step 5: Solve for x
    x = 186,228,561,143.04/620,715.20
  6. Step 6: Final answer
    x = 300,022.56

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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.