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Finding the Fourth Proportional to 289,325.10, 399,002.19 and 198,520.86

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Solution

The fourth proportional to 289,325.10, 399,002.19 and 198,520.86 is: 273,775.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,325.10 : 399,002.19 = 198,520.86 : x
  2. Step 2: Convert to fraction form
    289,325.10/399,002.19 = 198,520.86/x
  3. Step 3: Cross multiply
    289,325.10x = 399,002.19 × 198,520.86
  4. Step 4: Simplify right side
    289,325.10x = 79,210,257,900.68
  5. Step 5: Solve for x
    x = 79,210,257,900.68/289,325.10
  6. Step 6: Final answer
    x = 273,775.96

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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.