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Finding the Fourth Proportional to 439,906.40, 659,276.40 and 389,751.20

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Solution

The fourth proportional to 439,906.40, 659,276.40 and 389,751.20 is: 584,110.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,906.40 : 659,276.40 = 389,751.20 : x
  2. Step 2: Convert to fraction form
    439,906.40/659,276.40 = 389,751.20/x
  3. Step 3: Cross multiply
    439,906.40x = 659,276.40 × 389,751.20
  4. Step 4: Simplify right side
    439,906.40x = 256,953,768,031.68
  5. Step 5: Solve for x
    x = 256,953,768,031.68/439,906.40
  6. Step 6: Final answer
    x = 584,110.09

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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.