Home / 3,422.28-5,130.45-2,120.88

Finding the Fourth Proportional to 3,422.28, 5,130.45 and 2,120.88

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Solution

The fourth proportional to 3,422.28, 5,130.45 and 2,120.88 is: 3,179.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,422.28 : 5,130.45 = 2,120.88 : x
  2. Step 2: Convert to fraction form
    3,422.28/5,130.45 = 2,120.88/x
  3. Step 3: Cross multiply
    3,422.28x = 5,130.45 × 2,120.88
  4. Step 4: Simplify right side
    3,422.28x = 10,881,068.80
  5. Step 5: Solve for x
    x = 10,881,068.80/3,422.28
  6. Step 6: Final answer
    x = 3,179.48

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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.