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Finding the Fourth Proportional to 620,236.61, 856,019.08 and 378,659.22

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Solution

The fourth proportional to 620,236.61, 856,019.08 and 378,659.22 is: 522,606.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,236.61 : 856,019.08 = 378,659.22 : x
  2. Step 2: Convert to fraction form
    620,236.61/856,019.08 = 378,659.22/x
  3. Step 3: Cross multiply
    620,236.61x = 856,019.08 × 378,659.22
  4. Step 4: Simplify right side
    620,236.61x = 324,139,517,137.92
  5. Step 5: Solve for x
    x = 324,139,517,137.92/620,236.61
  6. Step 6: Final answer
    x = 522,606.23

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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.