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Finding the Fourth Proportional to 259,728.80, 389,593.20 and 231,735.20

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Solution

The fourth proportional to 259,728.80, 389,593.20 and 231,735.20 is: 347,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,728.80 : 389,593.20 = 231,735.20 : x
  2. Step 2: Convert to fraction form
    259,728.80/389,593.20 = 231,735.20/x
  3. Step 3: Cross multiply
    259,728.80x = 389,593.20 × 231,735.20
  4. Step 4: Simplify right side
    259,728.80x = 90,282,458,120.64
  5. Step 5: Solve for x
    x = 90,282,458,120.64/259,728.80
  6. Step 6: Final answer
    x = 347,602.80

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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.