Home / 2,128.52-3,192.78-1,396.28

Finding the Fourth Proportional to 2,128.52, 3,192.78 and 1,396.28

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Solution

The fourth proportional to 2,128.52, 3,192.78 and 1,396.28 is: 2,094.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.52 : 3,192.78 = 1,396.28 : x
  2. Step 2: Convert to fraction form
    2,128.52/3,192.78 = 1,396.28/x
  3. Step 3: Cross multiply
    2,128.52x = 3,192.78 × 1,396.28
  4. Step 4: Simplify right side
    2,128.52x = 4,458,014.86
  5. Step 5: Solve for x
    x = 4,458,014.86/2,128.52
  6. Step 6: Final answer
    x = 2,094.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.