Home / 419,947.20-629,920.80-139,464.45

Finding the Fourth Proportional to 419,947.20, 629,920.80 and 139,464.45

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Solution

The fourth proportional to 419,947.20, 629,920.80 and 139,464.45 is: 209,196.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,947.20 : 629,920.80 = 139,464.45 : x
  2. Step 2: Convert to fraction form
    419,947.20/629,920.80 = 139,464.45/x
  3. Step 3: Cross multiply
    419,947.20x = 629,920.80 × 139,464.45
  4. Step 4: Simplify right side
    419,947.20x = 87,851,557,915.56
  5. Step 5: Solve for x
    x = 87,851,557,915.56/419,947.20
  6. Step 6: Final answer
    x = 209,196.68

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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.