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Finding the Fourth Proportional to 263,469.80, 394,038.30 and 221,479.40

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Solution

The fourth proportional to 263,469.80, 394,038.30 and 221,479.40 is: 331,238.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,469.80 : 394,038.30 = 221,479.40 : x
  2. Step 2: Convert to fraction form
    263,469.80/394,038.30 = 221,479.40/x
  3. Step 3: Cross multiply
    263,469.80x = 394,038.30 × 221,479.40
  4. Step 4: Simplify right side
    263,469.80x = 87,271,366,261.02
  5. Step 5: Solve for x
    x = 87,271,366,261.02/263,469.80
  6. Step 6: Final answer
    x = 331,238.59

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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.