Home / 1,987.38-2,742.51-1,103.16

Finding the Fourth Proportional to 1,987.38, 2,742.51 and 1,103.16

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Solution

The fourth proportional to 1,987.38, 2,742.51 and 1,103.16 is: 1,522.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.38 : 2,742.51 = 1,103.16 : x
  2. Step 2: Convert to fraction form
    1,987.38/2,742.51 = 1,103.16/x
  3. Step 3: Cross multiply
    1,987.38x = 2,742.51 × 1,103.16
  4. Step 4: Simplify right side
    1,987.38x = 3,025,427.33
  5. Step 5: Solve for x
    x = 3,025,427.33/1,987.38
  6. Step 6: Final answer
    x = 1,522.32

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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.