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Finding the Fourth Proportional to 298,343.22, 411,690.72 and 189,439.54

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Solution

The fourth proportional to 298,343.22, 411,690.72 and 189,439.54 is: 261,412.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,343.22 : 411,690.72 = 189,439.54 : x
  2. Step 2: Convert to fraction form
    298,343.22/411,690.72 = 189,439.54/x
  3. Step 3: Cross multiply
    298,343.22x = 411,690.72 × 189,439.54
  4. Step 4: Simplify right side
    298,343.22x = 77,990,500,619.07
  5. Step 5: Solve for x
    x = 77,990,500,619.07/298,343.22
  6. Step 6: Final answer
    x = 261,412.01

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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.