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Finding the Fourth Proportional to 321,518.22, 482,178.79 and 222,315.90

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Solution

The fourth proportional to 321,518.22, 482,178.79 and 222,315.90 is: 333,405.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,518.22 : 482,178.79 = 222,315.90 : x
  2. Step 2: Convert to fraction form
    321,518.22/482,178.79 = 222,315.90/x
  3. Step 3: Cross multiply
    321,518.22x = 482,178.79 × 222,315.90
  4. Step 4: Simplify right side
    321,518.22x = 107,196,008,693.08
  5. Step 5: Solve for x
    x = 107,196,008,693.08/321,518.22
  6. Step 6: Final answer
    x = 333,405.71

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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.