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Finding the Fourth Proportional to 603,611.80, 905,417.70 and 303,976.60

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Solution

The fourth proportional to 603,611.80, 905,417.70 and 303,976.60 is: 455,964.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,611.80 : 905,417.70 = 303,976.60 : x
  2. Step 2: Convert to fraction form
    603,611.80/905,417.70 = 303,976.60/x
  3. Step 3: Cross multiply
    603,611.80x = 905,417.70 × 303,976.60
  4. Step 4: Simplify right side
    603,611.80x = 275,225,794,025.82
  5. Step 5: Solve for x
    x = 275,225,794,025.82/603,611.80
  6. Step 6: Final answer
    x = 455,964.90

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Double scale
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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.