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Finding the Fourth Proportional to 263,443.80, 394,290.90 and 263,443.80

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Solution

The fourth proportional to 263,443.80, 394,290.90 and 263,443.80 is: 394,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,443.80 : 394,290.90 = 263,443.80 : x
  2. Step 2: Convert to fraction form
    263,443.80/394,290.90 = 263,443.80/x
  3. Step 3: Cross multiply
    263,443.80x = 394,290.90 × 263,443.80
  4. Step 4: Simplify right side
    263,443.80x = 103,873,493,001.42
  5. Step 5: Solve for x
    x = 103,873,493,001.42/263,443.80
  6. Step 6: Final answer
    x = 394,290.90

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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.