Home / 1,987.88-2,743.08-1,103.48

Finding the Fourth Proportional to 1,987.88, 2,743.08 and 1,103.48

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Solution

The fourth proportional to 1,987.88, 2,743.08 and 1,103.48 is: 1,522.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.88 : 2,743.08 = 1,103.48 : x
  2. Step 2: Convert to fraction form
    1,987.88/2,743.08 = 1,103.48/x
  3. Step 3: Cross multiply
    1,987.88x = 2,743.08 × 1,103.48
  4. Step 4: Simplify right side
    1,987.88x = 3,026,933.92
  5. Step 5: Solve for x
    x = 3,026,933.92/1,987.88
  6. Step 6: Final answer
    x = 1,522.69

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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.