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Finding the Fourth Proportional to 449.67, 674.04 and 287.46

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Solution

The fourth proportional to 449.67, 674.04 and 287.46 is: 430.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.67 : 674.04 = 287.46 : x
  2. Step 2: Convert to fraction form
    449.67/674.04 = 287.46/x
  3. Step 3: Cross multiply
    449.67x = 674.04 × 287.46
  4. Step 4: Simplify right side
    449.67x = 193,759.54
  5. Step 5: Solve for x
    x = 193,759.54/449.67
  6. Step 6: Final answer
    x = 430.89

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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.