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Finding the Fourth Proportional to 638,420.74, 957,771.21 and 189,176.77

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Solution

The fourth proportional to 638,420.74, 957,771.21 and 189,176.77 is: 283,806.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,420.74 : 957,771.21 = 189,176.77 : x
  2. Step 2: Convert to fraction form
    638,420.74/957,771.21 = 189,176.77/x
  3. Step 3: Cross multiply
    638,420.74x = 957,771.21 × 189,176.77
  4. Step 4: Simplify right side
    638,420.74x = 181,188,063,906.79
  5. Step 5: Solve for x
    x = 181,188,063,906.79/638,420.74
  6. Step 6: Final answer
    x = 283,806.67

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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.