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Finding the Fourth Proportional to 449.52, 674.09 and 189.64

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Solution

The fourth proportional to 449.52, 674.09 and 189.64 is: 284.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.52 : 674.09 = 189.64 : x
  2. Step 2: Convert to fraction form
    449.52/674.09 = 189.64/x
  3. Step 3: Cross multiply
    449.52x = 674.09 × 189.64
  4. Step 4: Simplify right side
    449.52x = 127,830.58
  5. Step 5: Solve for x
    x = 127,830.58/449.52
  6. Step 6: Final answer
    x = 284.37

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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.