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Finding the Fourth Proportional to 317,189.16, 437,690.28 and 189,861.96

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Solution

The fourth proportional to 317,189.16, 437,690.28 and 189,861.96 is: 261,991.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,189.16 : 437,690.28 = 189,861.96 : x
  2. Step 2: Convert to fraction form
    317,189.16/437,690.28 = 189,861.96/x
  3. Step 3: Cross multiply
    317,189.16x = 437,690.28 × 189,861.96
  4. Step 4: Simplify right side
    317,189.16x = 83,100,734,433.75
  5. Step 5: Solve for x
    x = 83,100,734,433.75/317,189.16
  6. Step 6: Final answer
    x = 261,991.09

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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.