Home / 3,211.75-4,429.78-2,218.69

Finding the Fourth Proportional to 3,211.75, 4,429.78 and 2,218.69

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Solution

The fourth proportional to 3,211.75, 4,429.78 and 2,218.69 is: 3,060.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.75 : 4,429.78 = 2,218.69 : x
  2. Step 2: Convert to fraction form
    3,211.75/4,429.78 = 2,218.69/x
  3. Step 3: Cross multiply
    3,211.75x = 4,429.78 × 2,218.69
  4. Step 4: Simplify right side
    3,211.75x = 9,828,308.59
  5. Step 5: Solve for x
    x = 9,828,308.59/3,211.75
  6. Step 6: Final answer
    x = 3,060.11

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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.