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Finding the Fourth Proportional to 638,189.56, 957,398.19 and 211,750.97

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Solution

The fourth proportional to 638,189.56, 957,398.19 and 211,750.97 is: 317,664.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,189.56 : 957,398.19 = 211,750.97 : x
  2. Step 2: Convert to fraction form
    638,189.56/957,398.19 = 211,750.97/x
  3. Step 3: Cross multiply
    638,189.56x = 957,398.19 × 211,750.97
  4. Step 4: Simplify right side
    638,189.56x = 202,729,995,408.74
  5. Step 5: Solve for x
    x = 202,729,995,408.74/638,189.56
  6. Step 6: Final answer
    x = 317,664.23

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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.