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Finding the Fourth Proportional to 645.92, 967.90 and 299.19

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Solution

The fourth proportional to 645.92, 967.90 and 299.19 is: 448.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.92 : 967.90 = 299.19 : x
  2. Step 2: Convert to fraction form
    645.92/967.90 = 299.19/x
  3. Step 3: Cross multiply
    645.92x = 967.90 × 299.19
  4. Step 4: Simplify right side
    645.92x = 289,589.44
  5. Step 5: Solve for x
    x = 289,589.44/645.92
  6. Step 6: Final answer
    x = 448.33

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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.