Home / 3,979.78-5,491.49-2,300.87

Finding the Fourth Proportional to 3,979.78, 5,491.49 and 2,300.87

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Solution

The fourth proportional to 3,979.78, 5,491.49 and 2,300.87 is: 3,174.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.78 : 5,491.49 = 2,300.87 : x
  2. Step 2: Convert to fraction form
    3,979.78/5,491.49 = 2,300.87/x
  3. Step 3: Cross multiply
    3,979.78x = 5,491.49 × 2,300.87
  4. Step 4: Simplify right side
    3,979.78x = 12,635,165.63
  5. Step 5: Solve for x
    x = 12,635,165.63/3,979.78
  6. Step 6: Final answer
    x = 3,174.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.