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Finding the Fourth Proportional to 383,186.95, 528,839.54 and 211,122.56

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Solution

The fourth proportional to 383,186.95, 528,839.54 and 211,122.56 is: 291,372.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,186.95 : 528,839.54 = 211,122.56 : x
  2. Step 2: Convert to fraction form
    383,186.95/528,839.54 = 211,122.56/x
  3. Step 3: Cross multiply
    383,186.95x = 528,839.54 × 211,122.56
  4. Step 4: Simplify right side
    383,186.95x = 111,649,956,785.06
  5. Step 5: Solve for x
    x = 111,649,956,785.06/383,186.95
  6. Step 6: Final answer
    x = 291,372.02

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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.