Home / 419,939.39-629,779.89-120,339.65

Finding the Fourth Proportional to 419,939.39, 629,779.89 and 120,339.65

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Solution

The fourth proportional to 419,939.39, 629,779.89 and 120,339.65 is: 180,472.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,939.39 : 629,779.89 = 120,339.65 : x
  2. Step 2: Convert to fraction form
    419,939.39/629,779.89 = 120,339.65/x
  3. Step 3: Cross multiply
    419,939.39x = 629,779.89 × 120,339.65
  4. Step 4: Simplify right side
    419,939.39x = 75,787,491,539.64
  5. Step 5: Solve for x
    x = 75,787,491,539.64/419,939.39
  6. Step 6: Final answer
    x = 180,472.45

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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.