Home / 2,128.40-3,192.60-829.52

Finding the Fourth Proportional to 2,128.40, 3,192.60 and 829.52

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Solution

The fourth proportional to 2,128.40, 3,192.60 and 829.52 is: 1,244.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.40 : 3,192.60 = 829.52 : x
  2. Step 2: Convert to fraction form
    2,128.40/3,192.60 = 829.52/x
  3. Step 3: Cross multiply
    2,128.40x = 3,192.60 × 829.52
  4. Step 4: Simplify right side
    2,128.40x = 2,648,325.55
  5. Step 5: Solve for x
    x = 2,648,325.55/2,128.40
  6. Step 6: Final answer
    x = 1,244.28

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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.