Home / 2,128.22-3,192.30-878.80

Finding the Fourth Proportional to 2,128.22, 3,192.30 and 878.80

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Solution

The fourth proportional to 2,128.22, 3,192.30 and 878.80 is: 1,318.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.22 : 3,192.30 = 878.80 : x
  2. Step 2: Convert to fraction form
    2,128.22/3,192.30 = 878.80/x
  3. Step 3: Cross multiply
    2,128.22x = 3,192.30 × 878.80
  4. Step 4: Simplify right side
    2,128.22x = 2,805,393.24
  5. Step 5: Solve for x
    x = 2,805,393.24/2,128.22
  6. Step 6: Final answer
    x = 1,318.19

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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.