Home / 1,988.61-2,743.97-1,191.75

Finding the Fourth Proportional to 1,988.61, 2,743.97 and 1,191.75

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Solution

The fourth proportional to 1,988.61, 2,743.97 and 1,191.75 is: 1,644.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.61 : 2,743.97 = 1,191.75 : x
  2. Step 2: Convert to fraction form
    1,988.61/2,743.97 = 1,191.75/x
  3. Step 3: Cross multiply
    1,988.61x = 2,743.97 × 1,191.75
  4. Step 4: Simplify right side
    1,988.61x = 3,270,109.55
  5. Step 5: Solve for x
    x = 3,270,109.55/1,988.61
  6. Step 6: Final answer
    x = 1,644.42

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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.