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Finding the Fourth Proportional to 258,832.80, 388,090.80 and 100,879.20

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Solution

The fourth proportional to 258,832.80, 388,090.80 and 100,879.20 is: 151,257.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,832.80 : 388,090.80 = 100,879.20 : x
  2. Step 2: Convert to fraction form
    258,832.80/388,090.80 = 100,879.20/x
  3. Step 3: Cross multiply
    258,832.80x = 388,090.80 × 100,879.20
  4. Step 4: Simplify right side
    258,832.80x = 39,150,289,431.36
  5. Step 5: Solve for x
    x = 39,150,289,431.36/258,832.80
  6. Step 6: Final answer
    x = 151,257.06

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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.