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Finding the Fourth Proportional to 321,632.20, 445,885.32 and 304,568.80

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Solution

The fourth proportional to 321,632.20, 445,885.32 and 304,568.80 is: 422,229.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,632.20 : 445,885.32 = 304,568.80 : x
  2. Step 2: Convert to fraction form
    321,632.20/445,885.32 = 304,568.80/x
  3. Step 3: Cross multiply
    321,632.20x = 445,885.32 × 304,568.80
  4. Step 4: Simplify right side
    321,632.20x = 135,802,756,850.02
  5. Step 5: Solve for x
    x = 135,802,756,850.02/321,632.20
  6. Step 6: Final answer
    x = 422,229.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.