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Finding the Fourth Proportional to 300,728.82, 451,093.05 and 280,799.80

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Solution

The fourth proportional to 300,728.82, 451,093.05 and 280,799.80 is: 421,199.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,728.82 : 451,093.05 = 280,799.80 : x
  2. Step 2: Convert to fraction form
    300,728.82/451,093.05 = 280,799.80/x
  3. Step 3: Cross multiply
    300,728.82x = 451,093.05 × 280,799.80
  4. Step 4: Simplify right side
    300,728.82x = 126,666,838,221.39
  5. Step 5: Solve for x
    x = 126,666,838,221.39/300,728.82
  6. Step 6: Final answer
    x = 421,199.53

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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.