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Finding the Fourth Proportional to 621,550.96, 857,734.09 and 345,904.19

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Solution

The fourth proportional to 621,550.96, 857,734.09 and 345,904.19 is: 477,344.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,550.96 : 857,734.09 = 345,904.19 : x
  2. Step 2: Convert to fraction form
    621,550.96/857,734.09 = 345,904.19/x
  3. Step 3: Cross multiply
    621,550.96x = 857,734.09 × 345,904.19
  4. Step 4: Simplify right side
    621,550.96x = 296,693,815,636.84
  5. Step 5: Solve for x
    x = 296,693,815,636.84/621,550.96
  6. Step 6: Final answer
    x = 477,344.31

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Double scale
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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.