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Finding the Fourth Proportional to 967.92, 1,446.41 and 721.68

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Solution

The fourth proportional to 967.92, 1,446.41 and 721.68 is: 1,078.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.92 : 1,446.41 = 721.68 : x
  2. Step 2: Convert to fraction form
    967.92/1,446.41 = 721.68/x
  3. Step 3: Cross multiply
    967.92x = 1,446.41 × 721.68
  4. Step 4: Simplify right side
    967.92x = 1,043,841.56
  5. Step 5: Solve for x
    x = 1,043,841.56/967.92
  6. Step 6: Final answer
    x = 1,078.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.