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Finding the Fourth Proportional to 450.28, 674.91 and 206.30

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Solution

The fourth proportional to 450.28, 674.91 and 206.30 is: 309.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.28 : 674.91 = 206.30 : x
  2. Step 2: Convert to fraction form
    450.28/674.91 = 206.30/x
  3. Step 3: Cross multiply
    450.28x = 674.91 × 206.30
  4. Step 4: Simplify right side
    450.28x = 139,231.24
  5. Step 5: Solve for x
    x = 139,231.24/450.28
  6. Step 6: Final answer
    x = 309.21

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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.