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Finding the Fourth Proportional to 449.71, 674.64 and 255.09

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Solution

The fourth proportional to 449.71, 674.64 and 255.09 is: 382.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.71 : 674.64 = 255.09 : x
  2. Step 2: Convert to fraction form
    449.71/674.64 = 255.09/x
  3. Step 3: Cross multiply
    449.71x = 674.64 × 255.09
  4. Step 4: Simplify right side
    449.71x = 172,090.99
  5. Step 5: Solve for x
    x = 172,090.99/449.71
  6. Step 6: Final answer
    x = 382.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.