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Finding the Fourth Proportional to 263,470.80, 394,039.80 and 221,480.40

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Solution

The fourth proportional to 263,470.80, 394,039.80 and 221,480.40 is: 331,240.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,470.80 : 394,039.80 = 221,480.40 : x
  2. Step 2: Convert to fraction form
    263,470.80/394,039.80 = 221,480.40/x
  3. Step 3: Cross multiply
    263,470.80x = 394,039.80 × 221,480.40
  4. Step 4: Simplify right side
    263,470.80x = 87,272,092,519.92
  5. Step 5: Solve for x
    x = 87,272,092,519.92/263,470.80
  6. Step 6: Final answer
    x = 331,240.09

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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.