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Finding the Fourth Proportional to 620,535.40, 930,803.10 and 221,626.60

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Solution

The fourth proportional to 620,535.40, 930,803.10 and 221,626.60 is: 332,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,535.40 : 930,803.10 = 221,626.60 : x
  2. Step 2: Convert to fraction form
    620,535.40/930,803.10 = 221,626.60/x
  3. Step 3: Cross multiply
    620,535.40x = 930,803.10 × 221,626.60
  4. Step 4: Simplify right side
    620,535.40x = 206,290,726,322.46
  5. Step 5: Solve for x
    x = 206,290,726,322.46/620,535.40
  6. Step 6: Final answer
    x = 332,439.90

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Similar ratio
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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.