Home / 1,443.14-2,164.68-979.76

Finding the Fourth Proportional to 1,443.14, 2,164.68 and 979.76

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Solution

The fourth proportional to 1,443.14, 2,164.68 and 979.76 is: 1,469.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443.14 : 2,164.68 = 979.76 : x
  2. Step 2: Convert to fraction form
    1,443.14/2,164.68 = 979.76/x
  3. Step 3: Cross multiply
    1,443.14x = 2,164.68 × 979.76
  4. Step 4: Simplify right side
    1,443.14x = 2,120,866.88
  5. Step 5: Solve for x
    x = 2,120,866.88/1,443.14
  6. Step 6: Final answer
    x = 1,469.62

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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.