Home / 2,420.28-3,628.80-1,121.04

Finding the Fourth Proportional to 2,420.28, 3,628.80 and 1,121.04

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Solution

The fourth proportional to 2,420.28, 3,628.80 and 1,121.04 is: 1,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.28 : 3,628.80 = 1,121.04 : x
  2. Step 2: Convert to fraction form
    2,420.28/3,628.80 = 1,121.04/x
  3. Step 3: Cross multiply
    2,420.28x = 3,628.80 × 1,121.04
  4. Step 4: Simplify right side
    2,420.28x = 4,068,029.95
  5. Step 5: Solve for x
    x = 4,068,029.95/2,420.28
  6. Step 6: Final answer
    x = 1,680.81

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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.