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Finding the Fourth Proportional to 641,365.39, 885,023.97 and 434,212.40

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Solution

The fourth proportional to 641,365.39, 885,023.97 and 434,212.40 is: 599,172.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,365.39 : 885,023.97 = 434,212.40 : x
  2. Step 2: Convert to fraction form
    641,365.39/885,023.97 = 434,212.40/x
  3. Step 3: Cross multiply
    641,365.39x = 885,023.97 × 434,212.40
  4. Step 4: Simplify right side
    641,365.39x = 384,288,380,119.68
  5. Step 5: Solve for x
    x = 384,288,380,119.68/641,365.39
  6. Step 6: Final answer
    x = 599,172.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.