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Finding the Fourth Proportional to 449.62, 674.53 and 189.61

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Solution

The fourth proportional to 449.62, 674.53 and 189.61 is: 284.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.62 : 674.53 = 189.61 : x
  2. Step 2: Convert to fraction form
    449.62/674.53 = 189.61/x
  3. Step 3: Cross multiply
    449.62x = 674.53 × 189.61
  4. Step 4: Simplify right side
    449.62x = 127,895.47
  5. Step 5: Solve for x
    x = 127,895.47/449.62
  6. Step 6: Final answer
    x = 284.45

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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.