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Finding the Fourth Proportional to 620,200.16, 855,969.90 and 378,623.60

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Solution

The fourth proportional to 620,200.16, 855,969.90 and 378,623.60 is: 522,557.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,200.16 : 855,969.90 = 378,623.60 : x
  2. Step 2: Convert to fraction form
    620,200.16/855,969.90 = 378,623.60/x
  3. Step 3: Cross multiply
    620,200.16x = 855,969.90 × 378,623.60
  4. Step 4: Simplify right side
    620,200.16x = 324,090,405,029.64
  5. Step 5: Solve for x
    x = 324,090,405,029.64/620,200.16
  6. Step 6: Final answer
    x = 522,557.76

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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.