Home / 3,371.20-5,054.10-1,421.80

Finding the Fourth Proportional to 3,371.20, 5,054.10 and 1,421.80

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Solution

The fourth proportional to 3,371.20, 5,054.10 and 1,421.80 is: 2,131.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,371.20 : 5,054.10 = 1,421.80 : x
  2. Step 2: Convert to fraction form
    3,371.20/5,054.10 = 1,421.80/x
  3. Step 3: Cross multiply
    3,371.20x = 5,054.10 × 1,421.80
  4. Step 4: Simplify right side
    3,371.20x = 7,185,919.38
  5. Step 5: Solve for x
    x = 7,185,919.38/3,371.20
  6. Step 6: Final answer
    x = 2,131.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.