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Finding the Fourth Proportional to 321,338.40, 482,007.60 and 188,368.80

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Solution

The fourth proportional to 321,338.40, 482,007.60 and 188,368.80 is: 282,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,338.40 : 482,007.60 = 188,368.80 : x
  2. Step 2: Convert to fraction form
    321,338.40/482,007.60 = 188,368.80/x
  3. Step 3: Cross multiply
    321,338.40x = 482,007.60 × 188,368.80
  4. Step 4: Simplify right side
    321,338.40x = 90,795,193,202.88
  5. Step 5: Solve for x
    x = 90,795,193,202.88/321,338.40
  6. Step 6: Final answer
    x = 282,553.20

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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.