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Finding the Fourth Proportional to 189,861.60, 284,865.30 and 186,872.70

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Solution

The fourth proportional to 189,861.60, 284,865.30 and 186,872.70 is: 280,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,861.60 : 284,865.30 = 186,872.70 : x
  2. Step 2: Convert to fraction form
    189,861.60/284,865.30 = 186,872.70/x
  3. Step 3: Cross multiply
    189,861.60x = 284,865.30 × 186,872.70
  4. Step 4: Simplify right side
    189,861.60x = 53,233,547,747.31
  5. Step 5: Solve for x
    x = 53,233,547,747.31/189,861.60
  6. Step 6: Final answer
    x = 280,380.80

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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.