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Finding the Fourth Proportional to 221,255.40, 331,884.30 and 55,043.40

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Solution

The fourth proportional to 221,255.40, 331,884.30 and 55,043.40 is: 82,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,255.40 : 331,884.30 = 55,043.40 : x
  2. Step 2: Convert to fraction form
    221,255.40/331,884.30 = 55,043.40/x
  3. Step 3: Cross multiply
    221,255.40x = 331,884.30 × 55,043.40
  4. Step 4: Simplify right side
    221,255.40x = 18,268,040,278.62
  5. Step 5: Solve for x
    x = 18,268,040,278.62/221,255.40
  6. Step 6: Final answer
    x = 82,565.40

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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.