Home / 2,991.26-4,128.02-1,732.20

Finding the Fourth Proportional to 2,991.26, 4,128.02 and 1,732.20

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Solution

The fourth proportional to 2,991.26, 4,128.02 and 1,732.20 is: 2,390.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.26 : 4,128.02 = 1,732.20 : x
  2. Step 2: Convert to fraction form
    2,991.26/4,128.02 = 1,732.20/x
  3. Step 3: Cross multiply
    2,991.26x = 4,128.02 × 1,732.20
  4. Step 4: Simplify right side
    2,991.26x = 7,150,556.24
  5. Step 5: Solve for x
    x = 7,150,556.24/2,991.26
  6. Step 6: Final answer
    x = 2,390.48

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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.