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Finding the Fourth Proportional to 321,679.20, 482,635.80 and 111,338.40

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Solution

The fourth proportional to 321,679.20, 482,635.80 and 111,338.40 is: 167,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,679.20 : 482,635.80 = 111,338.40 : x
  2. Step 2: Convert to fraction form
    321,679.20/482,635.80 = 111,338.40/x
  3. Step 3: Cross multiply
    321,679.20x = 482,635.80 × 111,338.40
  4. Step 4: Simplify right side
    321,679.20x = 53,735,897,754.72
  5. Step 5: Solve for x
    x = 53,735,897,754.72/321,679.20
  6. Step 6: Final answer
    x = 167,048.10

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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.