Home / 2,128.80-3,192.96-829.92

Finding the Fourth Proportional to 2,128.80, 3,192.96 and 829.92

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Solution

The fourth proportional to 2,128.80, 3,192.96 and 829.92 is: 1,244.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.80 : 3,192.96 = 829.92 : x
  2. Step 2: Convert to fraction form
    2,128.80/3,192.96 = 829.92/x
  3. Step 3: Cross multiply
    2,128.80x = 3,192.96 × 829.92
  4. Step 4: Simplify right side
    2,128.80x = 2,649,901.36
  5. Step 5: Solve for x
    x = 2,649,901.36/2,128.80
  6. Step 6: Final answer
    x = 1,244.79

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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.