Home / 419,924.20-629,972.70-139,642.60

Finding the Fourth Proportional to 419,924.20, 629,972.70 and 139,642.60

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Solution

The fourth proportional to 419,924.20, 629,972.70 and 139,642.60 is: 209,492.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,924.20 : 629,972.70 = 139,642.60 : x
  2. Step 2: Convert to fraction form
    419,924.20/629,972.70 = 139,642.60/x
  3. Step 3: Cross multiply
    419,924.20x = 629,972.70 × 139,642.60
  4. Step 4: Simplify right side
    419,924.20x = 87,971,025,757.02
  5. Step 5: Solve for x
    x = 87,971,025,757.02/419,924.20
  6. Step 6: Final answer
    x = 209,492.63

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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.