Home / 419,923.20-629,971.20-139,641.60

Finding the Fourth Proportional to 419,923.20, 629,971.20 and 139,641.60

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Solution

The fourth proportional to 419,923.20, 629,971.20 and 139,641.60 is: 209,491.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,923.20 : 629,971.20 = 139,641.60 : x
  2. Step 2: Convert to fraction form
    419,923.20/629,971.20 = 139,641.60/x
  3. Step 3: Cross multiply
    419,923.20x = 629,971.20 × 139,641.60
  4. Step 4: Simplify right side
    419,923.20x = 87,970,186,321.92
  5. Step 5: Solve for x
    x = 87,970,186,321.92/419,923.20
  6. Step 6: Final answer
    x = 209,491.13

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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.