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Finding the Fourth Proportional to 2,668.73, 4,002.82 and 721.13

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Solution

The fourth proportional to 2,668.73, 4,002.82 and 721.13 is: 1,081.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.73 : 4,002.82 = 721.13 : x
  2. Step 2: Convert to fraction form
    2,668.73/4,002.82 = 721.13/x
  3. Step 3: Cross multiply
    2,668.73x = 4,002.82 × 721.13
  4. Step 4: Simplify right side
    2,668.73x = 2,886,553.59
  5. Step 5: Solve for x
    x = 2,886,553.59/2,668.73
  6. Step 6: Final answer
    x = 1,081.62

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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.