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Finding the Fourth Proportional to 321,173.10, 481,431.60 and 187,984.80

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Solution

The fourth proportional to 321,173.10, 481,431.60 and 187,984.80 is: 281,785.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,173.10 : 481,431.60 = 187,984.80 : x
  2. Step 2: Convert to fraction form
    321,173.10/481,431.60 = 187,984.80/x
  3. Step 3: Cross multiply
    321,173.10x = 481,431.60 × 187,984.80
  4. Step 4: Simplify right side
    321,173.10x = 90,501,823,039.68
  5. Step 5: Solve for x
    x = 90,501,823,039.68/321,173.10
  6. Step 6: Final answer
    x = 281,785.19

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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.