Home / 3,156.64-4,358.91-1,979.74

Finding the Fourth Proportional to 3,156.64, 4,358.91 and 1,979.74

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Solution

The fourth proportional to 3,156.64, 4,358.91 and 1,979.74 is: 2,733.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.64 : 4,358.91 = 1,979.74 : x
  2. Step 2: Convert to fraction form
    3,156.64/4,358.91 = 1,979.74/x
  3. Step 3: Cross multiply
    3,156.64x = 4,358.91 × 1,979.74
  4. Step 4: Simplify right side
    3,156.64x = 8,629,505.01
  5. Step 5: Solve for x
    x = 8,629,505.01/3,156.64
  6. Step 6: Final answer
    x = 2,733.76

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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.