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Finding the Fourth Proportional to 273,136.80, 409,321.20 and 217,072.80

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Solution

The fourth proportional to 273,136.80, 409,321.20 and 217,072.80 is: 325,304.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,136.80 : 409,321.20 = 217,072.80 : x
  2. Step 2: Convert to fraction form
    273,136.80/409,321.20 = 217,072.80/x
  3. Step 3: Cross multiply
    273,136.80x = 409,321.20 × 217,072.80
  4. Step 4: Simplify right side
    273,136.80x = 88,852,498,983.36
  5. Step 5: Solve for x
    x = 88,852,498,983.36/273,136.80
  6. Step 6: Final answer
    x = 325,304.02

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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.