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Finding the Fourth Proportional to 260,431.80, 389,610.90 and 225,756.60

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Solution

The fourth proportional to 260,431.80, 389,610.90 and 225,756.60 is: 337,736.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,431.80 : 389,610.90 = 225,756.60 : x
  2. Step 2: Convert to fraction form
    260,431.80/389,610.90 = 225,756.60/x
  3. Step 3: Cross multiply
    260,431.80x = 389,610.90 × 225,756.60
  4. Step 4: Simplify right side
    260,431.80x = 87,957,232,106.94
  5. Step 5: Solve for x
    x = 87,957,232,106.94/260,431.80
  6. Step 6: Final answer
    x = 337,736.14

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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.