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Finding the Fourth Proportional to 259,771.20, 388,879.20 and 231,777.60

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Solution

The fourth proportional to 259,771.20, 388,879.20 and 231,777.60 is: 346,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,771.20 : 388,879.20 = 231,777.60 : x
  2. Step 2: Convert to fraction form
    259,771.20/388,879.20 = 231,777.60/x
  3. Step 3: Cross multiply
    259,771.20x = 388,879.20 × 231,777.60
  4. Step 4: Simplify right side
    259,771.20x = 90,133,487,665.92
  5. Step 5: Solve for x
    x = 90,133,487,665.92/259,771.20
  6. Step 6: Final answer
    x = 346,972.60

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1.5x scale

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.