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Finding the Fourth Proportional to 260,436.80, 389,618.40 and 225,761.60

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Solution

The fourth proportional to 260,436.80, 389,618.40 and 225,761.60 is: 337,743.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,436.80 : 389,618.40 = 225,761.60 : x
  2. Step 2: Convert to fraction form
    260,436.80/389,618.40 = 225,761.60/x
  3. Step 3: Cross multiply
    260,436.80x = 389,618.40 × 225,761.60
  4. Step 4: Simplify right side
    260,436.80x = 87,960,873,373.44
  5. Step 5: Solve for x
    x = 87,960,873,373.44/260,436.80
  6. Step 6: Final answer
    x = 337,743.64

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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.