Home / 1,987.53-2,742.75-1,103.28

Finding the Fourth Proportional to 1,987.53, 2,742.75 and 1,103.28

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Solution

The fourth proportional to 1,987.53, 2,742.75 and 1,103.28 is: 1,522.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.53 : 2,742.75 = 1,103.28 : x
  2. Step 2: Convert to fraction form
    1,987.53/2,742.75 = 1,103.28/x
  3. Step 3: Cross multiply
    1,987.53x = 2,742.75 × 1,103.28
  4. Step 4: Simplify right side
    1,987.53x = 3,026,021.22
  5. Step 5: Solve for x
    x = 3,026,021.22/1,987.53
  6. Step 6: Final answer
    x = 1,522.50

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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.