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Finding the Fourth Proportional to 383,858.72, 529,553.78 and 222,620.40

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Solution

The fourth proportional to 383,858.72, 529,553.78 and 222,620.40 is: 307,116.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,858.72 : 529,553.78 = 222,620.40 : x
  2. Step 2: Convert to fraction form
    383,858.72/529,553.78 = 222,620.40/x
  3. Step 3: Cross multiply
    383,858.72x = 529,553.78 × 222,620.40
  4. Step 4: Simplify right side
    383,858.72x = 117,889,474,325.11
  5. Step 5: Solve for x
    x = 117,889,474,325.11/383,858.72
  6. Step 6: Final answer
    x = 307,116.83

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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.