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Finding the Fourth Proportional to 321,388.05, 481,887.66 and 143,861.97

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Solution

The fourth proportional to 321,388.05, 481,887.66 and 143,861.97 is: 215,705.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,388.05 : 481,887.66 = 143,861.97 : x
  2. Step 2: Convert to fraction form
    321,388.05/481,887.66 = 143,861.97/x
  3. Step 3: Cross multiply
    321,388.05x = 481,887.66 × 143,861.97
  4. Step 4: Simplify right side
    321,388.05x = 69,325,308,086.29
  5. Step 5: Solve for x
    x = 69,325,308,086.29/321,388.05
  6. Step 6: Final answer
    x = 215,705.93

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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.