Home / 419,914.89-629,743.14-120,315.20

Finding the Fourth Proportional to 419,914.89, 629,743.14 and 120,315.20

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Solution

The fourth proportional to 419,914.89, 629,743.14 and 120,315.20 is: 180,435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,914.89 : 629,743.14 = 120,315.20 : x
  2. Step 2: Convert to fraction form
    419,914.89/629,743.14 = 120,315.20/x
  3. Step 3: Cross multiply
    419,914.89x = 629,743.14 × 120,315.20
  4. Step 4: Simplify right side
    419,914.89x = 75,767,668,689.01
  5. Step 5: Solve for x
    x = 75,767,668,689.01/419,914.89
  6. Step 6: Final answer
    x = 180,435.78

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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.