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Finding the Fourth Proportional to 621,896.70, 931,350.08 and 354,847.56

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Solution

The fourth proportional to 621,896.70, 931,350.08 and 354,847.56 is: 531,418.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,896.70 : 931,350.08 = 354,847.56 : x
  2. Step 2: Convert to fraction form
    621,896.70/931,350.08 = 354,847.56/x
  3. Step 3: Cross multiply
    621,896.70x = 931,350.08 × 354,847.56
  4. Step 4: Simplify right side
    621,896.70x = 330,487,303,393.81
  5. Step 5: Solve for x
    x = 330,487,303,393.81/621,896.70
  6. Step 6: Final answer
    x = 531,418.33

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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.