Home / 3,979.38-5,491.32-2,210.88

Finding the Fourth Proportional to 3,979.38, 5,491.32 and 2,210.88

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Solution

The fourth proportional to 3,979.38, 5,491.32 and 2,210.88 is: 3,050.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.38 : 5,491.32 = 2,210.88 : x
  2. Step 2: Convert to fraction form
    3,979.38/5,491.32 = 2,210.88/x
  3. Step 3: Cross multiply
    3,979.38x = 5,491.32 × 2,210.88
  4. Step 4: Simplify right side
    3,979.38x = 12,140,649.56
  5. Step 5: Solve for x
    x = 12,140,649.56/3,979.38
  6. Step 6: Final answer
    x = 3,050.89

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1.5x scale

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.