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Finding the Fourth Proportional to 439.09, 605.99 and 252.64

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Solution

The fourth proportional to 439.09, 605.99 and 252.64 is: 348.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.09 : 605.99 = 252.64 : x
  2. Step 2: Convert to fraction form
    439.09/605.99 = 252.64/x
  3. Step 3: Cross multiply
    439.09x = 605.99 × 252.64
  4. Step 4: Simplify right side
    439.09x = 153,096.43
  5. Step 5: Solve for x
    x = 153,096.43/439.09
  6. Step 6: Final answer
    x = 348.67

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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.