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Finding the Fourth Proportional to 449.51, 674.27 and 205.31

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Solution

The fourth proportional to 449.51, 674.27 and 205.31 is: 307.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.51 : 674.27 = 205.31 : x
  2. Step 2: Convert to fraction form
    449.51/674.27 = 205.31/x
  3. Step 3: Cross multiply
    449.51x = 674.27 × 205.31
  4. Step 4: Simplify right side
    449.51x = 138,433.35
  5. Step 5: Solve for x
    x = 138,433.35/449.51
  6. Step 6: Final answer
    x = 307.97

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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.