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Finding the Fourth Proportional to 263,446.80, 394,003.80 and 221,456.40

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Solution

The fourth proportional to 263,446.80, 394,003.80 and 221,456.40 is: 331,204.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,446.80 : 394,003.80 = 221,456.40 : x
  2. Step 2: Convert to fraction form
    263,446.80/394,003.80 = 221,456.40/x
  3. Step 3: Cross multiply
    263,446.80x = 394,003.80 × 221,456.40
  4. Step 4: Simplify right side
    263,446.80x = 87,254,663,134.32
  5. Step 5: Solve for x
    x = 87,254,663,134.32/263,446.80
  6. Step 6: Final answer
    x = 331,204.11

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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.