Home / 3,979.31-5,488.40-2,916.68

Finding the Fourth Proportional to 3,979.31, 5,488.40 and 2,916.68

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Solution

The fourth proportional to 3,979.31, 5,488.40 and 2,916.68 is: 4,022.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.31 : 5,488.40 = 2,916.68 : x
  2. Step 2: Convert to fraction form
    3,979.31/5,488.40 = 2,916.68/x
  3. Step 3: Cross multiply
    3,979.31x = 5,488.40 × 2,916.68
  4. Step 4: Simplify right side
    3,979.31x = 16,007,864.49
  5. Step 5: Solve for x
    x = 16,007,864.49/3,979.31
  6. Step 6: Final answer
    x = 4,022.78

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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.