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Finding the Fourth Proportional to 620,236.36, 856,018.75 and 378,658.98

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Solution

The fourth proportional to 620,236.36, 856,018.75 and 378,658.98 is: 522,605.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,236.36 : 856,018.75 = 378,658.98 : x
  2. Step 2: Convert to fraction form
    620,236.36/856,018.75 = 378,658.98/x
  3. Step 3: Cross multiply
    620,236.36x = 856,018.75 × 378,658.98
  4. Step 4: Simplify right side
    620,236.36x = 324,139,185,789.23
  5. Step 5: Solve for x
    x = 324,139,185,789.23/620,236.36
  6. Step 6: Final answer
    x = 522,605.91

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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.