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Finding the Fourth Proportional to 363,450.80, 544,139.40 and 321,978.80

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Solution

The fourth proportional to 363,450.80, 544,139.40 and 321,978.80 is: 482,049.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,450.80 : 544,139.40 = 321,978.80 : x
  2. Step 2: Convert to fraction form
    363,450.80/544,139.40 = 321,978.80/x
  3. Step 3: Cross multiply
    363,450.80x = 544,139.40 × 321,978.80
  4. Step 4: Simplify right side
    363,450.80x = 175,201,351,044.72
  5. Step 5: Solve for x
    x = 175,201,351,044.72/363,450.80
  6. Step 6: Final answer
    x = 482,049.71

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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.