Home / 3,979.31-5,491.14-2,210.76

Finding the Fourth Proportional to 3,979.31, 5,491.14 and 2,210.76

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Solution

The fourth proportional to 3,979.31, 5,491.14 and 2,210.76 is: 3,050.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.31 : 5,491.14 = 2,210.76 : x
  2. Step 2: Convert to fraction form
    3,979.31/5,491.14 = 2,210.76/x
  3. Step 3: Cross multiply
    3,979.31x = 5,491.14 × 2,210.76
  4. Step 4: Simplify right side
    3,979.31x = 12,139,592.67
  5. Step 5: Solve for x
    x = 12,139,592.67/3,979.31
  6. Step 6: Final answer
    x = 3,050.68

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Half scale
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Double scale
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Similar ratio
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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.