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Finding the Fourth Proportional to 454,990.80, 682,486.20 and 445,149.30

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Solution

The fourth proportional to 454,990.80, 682,486.20 and 445,149.30 is: 667,723.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,990.80 : 682,486.20 = 445,149.30 : x
  2. Step 2: Convert to fraction form
    454,990.80/682,486.20 = 445,149.30/x
  3. Step 3: Cross multiply
    454,990.80x = 682,486.20 × 445,149.30
  4. Step 4: Simplify right side
    454,990.80x = 303,808,254,189.66
  5. Step 5: Solve for x
    x = 303,808,254,189.66/454,990.80
  6. Step 6: Final answer
    x = 667,723.95

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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.