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Finding the Fourth Proportional to 427,996.80, 641,380.80 and 314,793.60

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Solution

The fourth proportional to 427,996.80, 641,380.80 and 314,793.60 is: 471,738.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,996.80 : 641,380.80 = 314,793.60 : x
  2. Step 2: Convert to fraction form
    427,996.80/641,380.80 = 314,793.60/x
  3. Step 3: Cross multiply
    427,996.80x = 641,380.80 × 314,793.60
  4. Step 4: Simplify right side
    427,996.80x = 201,902,571,002.88
  5. Step 5: Solve for x
    x = 201,902,571,002.88/427,996.80
  6. Step 6: Final answer
    x = 471,738.51

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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.