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Finding the Fourth Proportional to 481,380.13, 664,448.58 and 311,625.73

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Solution

The fourth proportional to 481,380.13, 664,448.58 and 311,625.73 is: 430,136.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,380.13 : 664,448.58 = 311,625.73 : x
  2. Step 2: Convert to fraction form
    481,380.13/664,448.58 = 311,625.73/x
  3. Step 3: Cross multiply
    481,380.13x = 664,448.58 × 311,625.73
  4. Step 4: Simplify right side
    481,380.13x = 207,059,273,789.96
  5. Step 5: Solve for x
    x = 207,059,273,789.96/481,380.13
  6. Step 6: Final answer
    x = 430,136.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.