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Finding the Fourth Proportional to 323,906.80, 485,860.20 and 280,604.20

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Solution

The fourth proportional to 323,906.80, 485,860.20 and 280,604.20 is: 420,906.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,906.80 : 485,860.20 = 280,604.20 : x
  2. Step 2: Convert to fraction form
    323,906.80/485,860.20 = 280,604.20/x
  3. Step 3: Cross multiply
    323,906.80x = 485,860.20 × 280,604.20
  4. Step 4: Simplify right side
    323,906.80x = 136,334,412,732.84
  5. Step 5: Solve for x
    x = 136,334,412,732.84/323,906.80
  6. Step 6: Final answer
    x = 420,906.30

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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.