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Finding the Fourth Proportional to 663,144.80, 994,611.60 and 219,912.80

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Solution

The fourth proportional to 663,144.80, 994,611.60 and 219,912.80 is: 329,834.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,144.80 : 994,611.60 = 219,912.80 : x
  2. Step 2: Convert to fraction form
    663,144.80/994,611.60 = 219,912.80/x
  3. Step 3: Cross multiply
    663,144.80x = 994,611.60 × 219,912.80
  4. Step 4: Simplify right side
    663,144.80x = 218,727,821,868.48
  5. Step 5: Solve for x
    x = 218,727,821,868.48/663,144.80
  6. Step 6: Final answer
    x = 329,834.18

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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.