Home / 1,901.38-2,851.46-1,121.76

Finding the Fourth Proportional to 1,901.38, 2,851.46 and 1,121.76

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Solution

The fourth proportional to 1,901.38, 2,851.46 and 1,121.76 is: 1,682.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,901.38 : 2,851.46 = 1,121.76 : x
  2. Step 2: Convert to fraction form
    1,901.38/2,851.46 = 1,121.76/x
  3. Step 3: Cross multiply
    1,901.38x = 2,851.46 × 1,121.76
  4. Step 4: Simplify right side
    1,901.38x = 3,198,653.77
  5. Step 5: Solve for x
    x = 3,198,653.77/1,901.38
  6. Step 6: Final answer
    x = 1,682.28

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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.