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Finding the Fourth Proportional to 3,425.88, 5,138.80 and 828.82

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Solution

The fourth proportional to 3,425.88, 5,138.80 and 828.82 is: 1,243.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.88 : 5,138.80 = 828.82 : x
  2. Step 2: Convert to fraction form
    3,425.88/5,138.80 = 828.82/x
  3. Step 3: Cross multiply
    3,425.88x = 5,138.80 × 828.82
  4. Step 4: Simplify right side
    3,425.88x = 4,259,140.22
  5. Step 5: Solve for x
    x = 4,259,140.22/3,425.88
  6. Step 6: Final answer
    x = 1,243.23

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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.