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Finding the Fourth Proportional to 321,938.80, 482,716.20 and 197,369.20

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Solution

The fourth proportional to 321,938.80, 482,716.20 and 197,369.20 is: 295,936.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,938.80 : 482,716.20 = 197,369.20 : x
  2. Step 2: Convert to fraction form
    321,938.80/482,716.20 = 197,369.20/x
  3. Step 3: Cross multiply
    321,938.80x = 482,716.20 × 197,369.20
  4. Step 4: Simplify right side
    321,938.80x = 95,273,310,221.04
  5. Step 5: Solve for x
    x = 95,273,310,221.04/321,938.80
  6. Step 6: Final answer
    x = 295,936.09

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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.