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Finding the Fourth Proportional to 321,115.17, 481,513.99 and 188,028.93

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Solution

The fourth proportional to 321,115.17, 481,513.99 and 188,028.93 is: 281,950.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,115.17 : 481,513.99 = 188,028.93 : x
  2. Step 2: Convert to fraction form
    321,115.17/481,513.99 = 188,028.93/x
  3. Step 3: Cross multiply
    321,115.17x = 481,513.99 × 188,028.93
  4. Step 4: Simplify right side
    321,115.17x = 90,538,560,319.73
  5. Step 5: Solve for x
    x = 90,538,560,319.73/321,115.17
  6. Step 6: Final answer
    x = 281,950.43

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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.