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Finding the Fourth Proportional to 263,454.80, 394,015.80 and 221,464.40

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Solution

The fourth proportional to 263,454.80, 394,015.80 and 221,464.40 is: 331,216.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,454.80 : 394,015.80 = 221,464.40 : x
  2. Step 2: Convert to fraction form
    263,454.80/394,015.80 = 221,464.40/x
  3. Step 3: Cross multiply
    263,454.80x = 394,015.80 × 221,464.40
  4. Step 4: Simplify right side
    263,454.80x = 87,260,472,737.52
  5. Step 5: Solve for x
    x = 87,260,472,737.52/263,454.80
  6. Step 6: Final answer
    x = 331,216.11

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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.