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Finding the Fourth Proportional to 621,735.20, 857,994.60 and 353,463.20

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Solution

The fourth proportional to 621,735.20, 857,994.60 and 353,463.20 is: 487,779.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,735.20 : 857,994.60 = 353,463.20 : x
  2. Step 2: Convert to fraction form
    621,735.20/857,994.60 = 353,463.20/x
  3. Step 3: Cross multiply
    621,735.20x = 857,994.60 × 353,463.20
  4. Step 4: Simplify right side
    621,735.20x = 303,269,512,608.75
  5. Step 5: Solve for x
    x = 303,269,512,608.75/621,735.20
  6. Step 6: Final answer
    x = 487,779.23

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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.