Home / 419,821.40-629,732.10-403,491.80

Finding the Fourth Proportional to 419,821.40, 629,732.10 and 403,491.80

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Solution

The fourth proportional to 419,821.40, 629,732.10 and 403,491.80 is: 605,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,821.40 : 629,732.10 = 403,491.80 : x
  2. Step 2: Convert to fraction form
    419,821.40/629,732.10 = 403,491.80/x
  3. Step 3: Cross multiply
    419,821.40x = 629,732.10 × 403,491.80
  4. Step 4: Simplify right side
    419,821.40x = 254,091,738,546.78
  5. Step 5: Solve for x
    x = 254,091,738,546.78/419,821.40
  6. Step 6: Final answer
    x = 605,237.70

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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.