Home / 1,987.90-2,743.26-1,103.68

Finding the Fourth Proportional to 1,987.90, 2,743.26 and 1,103.68

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Solution

The fourth proportional to 1,987.90, 2,743.26 and 1,103.68 is: 1,523.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.90 : 2,743.26 = 1,103.68 : x
  2. Step 2: Convert to fraction form
    1,987.90/2,743.26 = 1,103.68/x
  3. Step 3: Cross multiply
    1,987.90x = 2,743.26 × 1,103.68
  4. Step 4: Simplify right side
    1,987.90x = 3,027,681.20
  5. Step 5: Solve for x
    x = 3,027,681.20/1,987.90
  6. Step 6: Final answer
    x = 1,523.06

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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.