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Finding the Fourth Proportional to 1,900, 2,622 and 1,072

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Solution

The fourth proportional to 1,900, 2,622 and 1,072 is: 1,479.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900 : 2,622 = 1,072 : x
  2. Step 2: Convert to fraction form
    1,900/2,622 = 1,072/x
  3. Step 3: Cross multiply
    1,900x = 2,622 × 1,072
  4. Step 4: Simplify right side
    1,900x = 2,810,784
  5. Step 5: Solve for x
    x = 2,810,784/1,900
  6. Step 6: Final answer
    x = 1,479.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.