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Finding the Fourth Proportional to 404,364.20, 606,692.10 and 389,784.20

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Solution

The fourth proportional to 404,364.20, 606,692.10 and 389,784.20 is: 584,816.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,364.20 : 606,692.10 = 389,784.20 : x
  2. Step 2: Convert to fraction form
    404,364.20/606,692.10 = 389,784.20/x
  3. Step 3: Cross multiply
    404,364.20x = 606,692.10 × 389,784.20
  4. Step 4: Simplify right side
    404,364.20x = 236,478,994,844.82
  5. Step 5: Solve for x
    x = 236,478,994,844.82/404,364.20
  6. Step 6: Final answer
    x = 584,816.84

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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.