Home / 1,988.07-2,743.60-1,103.95

Finding the Fourth Proportional to 1,988.07, 2,743.60 and 1,103.95

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Solution

The fourth proportional to 1,988.07, 2,743.60 and 1,103.95 is: 1,523.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.07 : 2,743.60 = 1,103.95 : x
  2. Step 2: Convert to fraction form
    1,988.07/2,743.60 = 1,103.95/x
  3. Step 3: Cross multiply
    1,988.07x = 2,743.60 × 1,103.95
  4. Step 4: Simplify right side
    1,988.07x = 3,028,797.22
  5. Step 5: Solve for x
    x = 3,028,797.22/1,988.07
  6. Step 6: Final answer
    x = 1,523.49

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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.