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Finding the Fourth Proportional to 1,900.51, 2,850.15 and 1,120.88

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Solution

The fourth proportional to 1,900.51, 2,850.15 and 1,120.88 is: 1,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.51 : 2,850.15 = 1,120.88 : x
  2. Step 2: Convert to fraction form
    1,900.51/2,850.15 = 1,120.88/x
  3. Step 3: Cross multiply
    1,900.51x = 2,850.15 × 1,120.88
  4. Step 4: Simplify right side
    1,900.51x = 3,194,687.46
  5. Step 5: Solve for x
    x = 3,194,687.46/1,900.51
  6. Step 6: Final answer
    x = 1,680.97

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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.