Home / 1,987.81-2,743.13-1,103.59

Finding the Fourth Proportional to 1,987.81, 2,743.13 and 1,103.59

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Solution

The fourth proportional to 1,987.81, 2,743.13 and 1,103.59 is: 1,522.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.81 : 2,743.13 = 1,103.59 : x
  2. Step 2: Convert to fraction form
    1,987.81/2,743.13 = 1,103.59/x
  3. Step 3: Cross multiply
    1,987.81x = 2,743.13 × 1,103.59
  4. Step 4: Simplify right side
    1,987.81x = 3,027,297.02
  5. Step 5: Solve for x
    x = 3,027,297.02/1,987.81
  6. Step 6: Final answer
    x = 1,522.93

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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.