Home / 3,218.10-4,437.09-2,221.80

Finding the Fourth Proportional to 3,218.10, 4,437.09 and 2,221.80

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Solution

The fourth proportional to 3,218.10, 4,437.09 and 2,221.80 is: 3,063.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.10 : 4,437.09 = 2,221.80 : x
  2. Step 2: Convert to fraction form
    3,218.10/4,437.09 = 2,221.80/x
  3. Step 3: Cross multiply
    3,218.10x = 4,437.09 × 2,221.80
  4. Step 4: Simplify right side
    3,218.10x = 9,858,326.56
  5. Step 5: Solve for x
    x = 9,858,326.56/3,218.10
  6. Step 6: Final answer
    x = 3,063.40

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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.