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Finding the Fourth Proportional to 2,111, 3,168 and 743

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Solution

The fourth proportional to 2,111, 3,168 and 743 is: 1,115.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111 : 3,168 = 743 : x
  2. Step 2: Convert to fraction form
    2,111/3,168 = 743/x
  3. Step 3: Cross multiply
    2,111x = 3,168 × 743
  4. Step 4: Simplify right side
    2,111x = 2,353,824
  5. Step 5: Solve for x
    x = 2,353,824/2,111
  6. Step 6: Final answer
    x = 1,115.03

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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.