Home / 1,987.83-2,743.34-1,103.90

Finding the Fourth Proportional to 1,987.83, 2,743.34 and 1,103.90

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Solution

The fourth proportional to 1,987.83, 2,743.34 and 1,103.90 is: 1,523.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.83 : 2,743.34 = 1,103.90 : x
  2. Step 2: Convert to fraction form
    1,987.83/2,743.34 = 1,103.90/x
  3. Step 3: Cross multiply
    1,987.83x = 2,743.34 × 1,103.90
  4. Step 4: Simplify right side
    1,987.83x = 3,028,353.79
  5. Step 5: Solve for x
    x = 3,028,353.79/1,987.83
  6. Step 6: Final answer
    x = 1,523.45

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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.