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Finding the Fourth Proportional to 405,194.40, 606,989.70 and 355,330.80

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Solution

The fourth proportional to 405,194.40, 606,989.70 and 355,330.80 is: 532,292.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,194.40 : 606,989.70 = 355,330.80 : x
  2. Step 2: Convert to fraction form
    405,194.40/606,989.70 = 355,330.80/x
  3. Step 3: Cross multiply
    405,194.40x = 606,989.70 × 355,330.80
  4. Step 4: Simplify right side
    405,194.40x = 215,682,135,692.76
  5. Step 5: Solve for x
    x = 215,682,135,692.76/405,194.40
  6. Step 6: Final answer
    x = 532,292.98

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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.