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Finding the Fourth Proportional to 298,912.40, 449,059.80 and 205,600.40

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Solution

The fourth proportional to 298,912.40, 449,059.80 and 205,600.40 is: 308,876.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,912.40 : 449,059.80 = 205,600.40 : x
  2. Step 2: Convert to fraction form
    298,912.40/449,059.80 = 205,600.40/x
  3. Step 3: Cross multiply
    298,912.40x = 449,059.80 × 205,600.40
  4. Step 4: Simplify right side
    298,912.40x = 92,326,874,503.92
  5. Step 5: Solve for x
    x = 92,326,874,503.92/298,912.40
  6. Step 6: Final answer
    x = 308,876.03

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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.