Home / 2,151.38-2,969.20-1,255.41

Finding the Fourth Proportional to 2,151.38, 2,969.20 and 1,255.41

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Solution

The fourth proportional to 2,151.38, 2,969.20 and 1,255.41 is: 1,732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.38 : 2,969.20 = 1,255.41 : x
  2. Step 2: Convert to fraction form
    2,151.38/2,969.20 = 1,255.41/x
  3. Step 3: Cross multiply
    2,151.38x = 2,969.20 × 1,255.41
  4. Step 4: Simplify right side
    2,151.38x = 3,727,563.37
  5. Step 5: Solve for x
    x = 3,727,563.37/2,151.38
  6. Step 6: Final answer
    x = 1,732.64

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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.