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Finding the Fourth Proportional to 606,989.40, 911,520.90 and 397,555.80

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Solution

The fourth proportional to 606,989.40, 911,520.90 and 397,555.80 is: 597,012.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,989.40 : 911,520.90 = 397,555.80 : x
  2. Step 2: Convert to fraction form
    606,989.40/911,520.90 = 397,555.80/x
  3. Step 3: Cross multiply
    606,989.40x = 911,520.90 × 397,555.80
  4. Step 4: Simplify right side
    606,989.40x = 362,380,420,616.22
  5. Step 5: Solve for x
    x = 362,380,420,616.22/606,989.40
  6. Step 6: Final answer
    x = 597,012.77

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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.