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Finding the Fourth Proportional to 620,236.73, 856,019.27 and 378,659.36

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Solution

The fourth proportional to 620,236.73, 856,019.27 and 378,659.36 is: 522,606.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,236.73 : 856,019.27 = 378,659.36 : x
  2. Step 2: Convert to fraction form
    620,236.73/856,019.27 = 378,659.36/x
  3. Step 3: Cross multiply
    620,236.73x = 856,019.27 × 378,659.36
  4. Step 4: Simplify right side
    620,236.73x = 324,139,712,012.56
  5. Step 5: Solve for x
    x = 324,139,712,012.56/620,236.73
  6. Step 6: Final answer
    x = 522,606.44

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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.