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Finding the Fourth Proportional to 419,878.58, 629,817.84 and 139,395.83

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Solution

The fourth proportional to 419,878.58, 629,817.84 and 139,395.83 is: 209,093.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,878.58 : 629,817.84 = 139,395.83 : x
  2. Step 2: Convert to fraction form
    419,878.58/629,817.84 = 139,395.83/x
  3. Step 3: Cross multiply
    419,878.58x = 629,817.84 × 139,395.83
  4. Step 4: Simplify right side
    419,878.58x = 87,793,977,406.52
  5. Step 5: Solve for x
    x = 87,793,977,406.52/419,878.58
  6. Step 6: Final answer
    x = 209,093.73

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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.