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Finding the Fourth Proportional to 321,121.20, 481,163.40 and 202,580.40

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Solution

The fourth proportional to 321,121.20, 481,163.40 and 202,580.40 is: 303,543.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,121.20 : 481,163.40 = 202,580.40 : x
  2. Step 2: Convert to fraction form
    321,121.20/481,163.40 = 202,580.40/x
  3. Step 3: Cross multiply
    321,121.20x = 481,163.40 × 202,580.40
  4. Step 4: Simplify right side
    321,121.20x = 97,474,274,037.36
  5. Step 5: Solve for x
    x = 97,474,274,037.36/321,121.20
  6. Step 6: Final answer
    x = 303,543.57

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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.