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Finding the Fourth Proportional to 620,943.12, 930,661.92 and 440,745.12

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Solution

The fourth proportional to 620,943.12, 930,661.92 and 440,745.12 is: 660,583.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,943.12 : 930,661.92 = 440,745.12 : x
  2. Step 2: Convert to fraction form
    620,943.12/930,661.92 = 440,745.12/x
  3. Step 3: Cross multiply
    620,943.12x = 930,661.92 × 440,745.12
  4. Step 4: Simplify right side
    620,943.12x = 410,184,699,609.83
  5. Step 5: Solve for x
    x = 410,184,699,609.83/620,943.12
  6. Step 6: Final answer
    x = 660,583.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.