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Finding the Fourth Proportional to 419,855,381.70, 629,783,072.55 and 267,178,287.30

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Solution

The fourth proportional to 419,855,381.70, 629,783,072.55 and 267,178,287.30 is: 400,767,430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,855,381.70 : 629,783,072.55 = 267,178,287.30 : x
  2. Step 2: Convert to fraction form
    419,855,381.70/629,783,072.55 = 267,178,287.30/x
  3. Step 3: Cross multiply
    419,855,381.70x = 629,783,072.55 × 267,178,287.30
  4. Step 4: Simplify right side
    419,855,381.70x = 168,264,362,694,440,640
  5. Step 5: Solve for x
    x = 168,264,362,694,440,640/419,855,381.70
  6. Step 6: Final answer
    x = 400,767,430.95

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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.