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Finding the Fourth Proportional to 449.42, 674.07 and 141.21

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Solution

The fourth proportional to 449.42, 674.07 and 141.21 is: 211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.42 : 674.07 = 141.21 : x
  2. Step 2: Convert to fraction form
    449.42/674.07 = 141.21/x
  3. Step 3: Cross multiply
    449.42x = 674.07 × 141.21
  4. Step 4: Simplify right side
    449.42x = 95,185.42
  5. Step 5: Solve for x
    x = 95,185.42/449.42
  6. Step 6: Final answer
    x = 211.80

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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.