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Finding the Fourth Proportional to 419,990.70, 629,988.57 and 104,447.62

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Solution

The fourth proportional to 419,990.70, 629,988.57 and 104,447.62 is: 156,672.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,990.70 : 629,988.57 = 104,447.62 : x
  2. Step 2: Convert to fraction form
    419,990.70/629,988.57 = 104,447.62/x
  3. Step 3: Cross multiply
    419,990.70x = 629,988.57 × 104,447.62
  4. Step 4: Simplify right side
    419,990.70x = 65,800,806,763.70
  5. Step 5: Solve for x
    x = 65,800,806,763.70/419,990.70
  6. Step 6: Final answer
    x = 156,672.06

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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.