Home / 1,987.41-2,742.63-1,103.21

Finding the Fourth Proportional to 1,987.41, 2,742.63 and 1,103.21

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Solution

The fourth proportional to 1,987.41, 2,742.63 and 1,103.21 is: 1,522.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.41 : 2,742.63 = 1,103.21 : x
  2. Step 2: Convert to fraction form
    1,987.41/2,742.63 = 1,103.21/x
  3. Step 3: Cross multiply
    1,987.41x = 2,742.63 × 1,103.21
  4. Step 4: Simplify right side
    1,987.41x = 3,025,691.33
  5. Step 5: Solve for x
    x = 3,025,691.33/1,987.41
  6. Step 6: Final answer
    x = 1,522.43

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1.5x scale

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.