Home / 2,987.30-4,121.42-1,745.30

Finding the Fourth Proportional to 2,987.30, 4,121.42 and 1,745.30

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Solution

The fourth proportional to 2,987.30, 4,121.42 and 1,745.30 is: 2,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.30 : 4,121.42 = 1,745.30 : x
  2. Step 2: Convert to fraction form
    2,987.30/4,121.42 = 1,745.30/x
  3. Step 3: Cross multiply
    2,987.30x = 4,121.42 × 1,745.30
  4. Step 4: Simplify right side
    2,987.30x = 7,193,114.33
  5. Step 5: Solve for x
    x = 7,193,114.33/2,987.30
  6. Step 6: Final answer
    x = 2,407.90

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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.