Home / 5,218.80-7,201.44-3,122.88

Finding the Fourth Proportional to 5,218.80, 7,201.44 and 3,122.88

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Solution

The fourth proportional to 5,218.80, 7,201.44 and 3,122.88 is: 4,309.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,218.80 : 7,201.44 = 3,122.88 : x
  2. Step 2: Convert to fraction form
    5,218.80/7,201.44 = 3,122.88/x
  3. Step 3: Cross multiply
    5,218.80x = 7,201.44 × 3,122.88
  4. Step 4: Simplify right side
    5,218.80x = 22,489,232.95
  5. Step 5: Solve for x
    x = 22,489,232.95/5,218.80
  6. Step 6: Final answer
    x = 4,309.27

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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.