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Finding the Fourth Proportional to 281,840.80, 422,761.20 and 263,178.40

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Solution

The fourth proportional to 281,840.80, 422,761.20 and 263,178.40 is: 394,767.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,840.80 : 422,761.20 = 263,178.40 : x
  2. Step 2: Convert to fraction form
    281,840.80/422,761.20 = 263,178.40/x
  3. Step 3: Cross multiply
    281,840.80x = 422,761.20 × 263,178.40
  4. Step 4: Simplify right side
    281,840.80x = 111,261,616,198.08
  5. Step 5: Solve for x
    x = 111,261,616,198.08/281,840.80
  6. Step 6: Final answer
    x = 394,767.60

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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.