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Finding the Fourth Proportional to 383,421.74, 529,059.74 and 222,245.28

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Solution

The fourth proportional to 383,421.74, 529,059.74 and 222,245.28 is: 306,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,421.74 : 529,059.74 = 222,245.28 : x
  2. Step 2: Convert to fraction form
    383,421.74/529,059.74 = 222,245.28/x
  3. Step 3: Cross multiply
    383,421.74x = 529,059.74 × 222,245.28
  4. Step 4: Simplify right side
    383,421.74x = 117,581,028,941.80
  5. Step 5: Solve for x
    x = 117,581,028,941.80/383,421.74
  6. Step 6: Final answer
    x = 306,662.40

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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.