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Finding the Fourth Proportional to 2,791.84, 4,189.13 and 1,125.89

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Solution

The fourth proportional to 2,791.84, 4,189.13 and 1,125.89 is: 1,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.84 : 4,189.13 = 1,125.89 : x
  2. Step 2: Convert to fraction form
    2,791.84/4,189.13 = 1,125.89/x
  3. Step 3: Cross multiply
    2,791.84x = 4,189.13 × 1,125.89
  4. Step 4: Simplify right side
    2,791.84x = 4,716,504.42
  5. Step 5: Solve for x
    x = 4,716,504.42/2,791.84
  6. Step 6: Final answer
    x = 1,689.39

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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.