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Finding the Fourth Proportional to 260,464.80, 389,660.40 and 225,789.60

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Solution

The fourth proportional to 260,464.80, 389,660.40 and 225,789.60 is: 337,785.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,464.80 : 389,660.40 = 225,789.60 : x
  2. Step 2: Convert to fraction form
    260,464.80/389,660.40 = 225,789.60/x
  3. Step 3: Cross multiply
    260,464.80x = 389,660.40 × 225,789.60
  4. Step 4: Simplify right side
    260,464.80x = 87,981,265,851.84
  5. Step 5: Solve for x
    x = 87,981,265,851.84/260,464.80
  6. Step 6: Final answer
    x = 337,785.63

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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.