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Finding the Fourth Proportional to 548,305.20, 821,801.70 and 281,928.60

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Solution

The fourth proportional to 548,305.20, 821,801.70 and 281,928.60 is: 422,555.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,305.20 : 821,801.70 = 281,928.60 : x
  2. Step 2: Convert to fraction form
    548,305.20/821,801.70 = 281,928.60/x
  3. Step 3: Cross multiply
    548,305.20x = 821,801.70 × 281,928.60
  4. Step 4: Simplify right side
    548,305.20x = 231,689,402,758.62
  5. Step 5: Solve for x
    x = 231,689,402,758.62/548,305.20
  6. Step 6: Final answer
    x = 422,555.55

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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.