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Finding the Fourth Proportional to 449.62, 674.43 and 206.11

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Solution

The fourth proportional to 449.62, 674.43 and 206.11 is: 309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.62 : 674.43 = 206.11 : x
  2. Step 2: Convert to fraction form
    449.62/674.43 = 206.11/x
  3. Step 3: Cross multiply
    449.62x = 674.43 × 206.11
  4. Step 4: Simplify right side
    449.62x = 139,006.84
  5. Step 5: Solve for x
    x = 139,006.84/449.62
  6. Step 6: Final answer
    x = 309.17

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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.