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Finding the Fourth Proportional to 383,620.95, 529,428.44 and 211,572.58

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Solution

The fourth proportional to 383,620.95, 529,428.44 and 211,572.58 is: 291,987.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,620.95 : 529,428.44 = 211,572.58 : x
  2. Step 2: Convert to fraction form
    383,620.95/529,428.44 = 211,572.58/x
  3. Step 3: Cross multiply
    383,620.95x = 529,428.44 × 211,572.58
  4. Step 4: Simplify right side
    383,620.95x = 112,012,538,329.03
  5. Step 5: Solve for x
    x = 112,012,538,329.03/383,620.95
  6. Step 6: Final answer
    x = 291,987.54

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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.