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Finding the Fourth Proportional to 321,382.05, 481,878.66 and 143,855.97

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Solution

The fourth proportional to 321,382.05, 481,878.66 and 143,855.97 is: 215,696.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,382.05 : 481,878.66 = 143,855.97 : x
  2. Step 2: Convert to fraction form
    321,382.05/481,878.66 = 143,855.97/x
  3. Step 3: Cross multiply
    321,382.05x = 481,878.66 × 143,855.97
  4. Step 4: Simplify right side
    321,382.05x = 69,321,122,056.60
  5. Step 5: Solve for x
    x = 69,321,122,056.60/321,382.05
  6. Step 6: Final answer
    x = 215,696.93

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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.