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Finding the Fourth Proportional to 321,660.38, 481,881.52 and 214,721.85

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Solution

The fourth proportional to 321,660.38, 481,881.52 and 214,721.85 is: 321,676.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,660.38 : 481,881.52 = 214,721.85 : x
  2. Step 2: Convert to fraction form
    321,660.38/481,881.52 = 214,721.85/x
  3. Step 3: Cross multiply
    321,660.38x = 481,881.52 × 214,721.85
  4. Step 4: Simplify right side
    321,660.38x = 103,470,491,455.21
  5. Step 5: Solve for x
    x = 103,470,491,455.21/321,660.38
  6. Step 6: Final answer
    x = 321,676.21

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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.