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Finding the Fourth Proportional to 450.12, 674.86 and 279.08

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Solution

The fourth proportional to 450.12, 674.86 and 279.08 is: 418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.12 : 674.86 = 279.08 : x
  2. Step 2: Convert to fraction form
    450.12/674.86 = 279.08/x
  3. Step 3: Cross multiply
    450.12x = 674.86 × 279.08
  4. Step 4: Simplify right side
    450.12x = 188,339.93
  5. Step 5: Solve for x
    x = 188,339.93/450.12
  6. Step 6: Final answer
    x = 418.42

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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.