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Finding the Fourth Proportional to 383,357.63, 529,037.12 and 211,281.91

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Solution

The fourth proportional to 383,357.63, 529,037.12 and 211,281.91 is: 291,571.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,357.63 : 529,037.12 = 211,281.91 : x
  2. Step 2: Convert to fraction form
    383,357.63/529,037.12 = 211,281.91/x
  3. Step 3: Cross multiply
    383,357.63x = 529,037.12 × 211,281.91
  4. Step 4: Simplify right side
    383,357.63x = 111,775,972,380.11
  5. Step 5: Solve for x
    x = 111,775,972,380.11/383,357.63
  6. Step 6: Final answer
    x = 291,571.01

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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.