Home / 1,227.21-1,839.68-447.03

Finding the Fourth Proportional to 1,227.21, 1,839.68 and 447.03

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Solution

The fourth proportional to 1,227.21, 1,839.68 and 447.03 is: 670.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.21 : 1,839.68 = 447.03 : x
  2. Step 2: Convert to fraction form
    1,227.21/1,839.68 = 447.03/x
  3. Step 3: Cross multiply
    1,227.21x = 1,839.68 × 447.03
  4. Step 4: Simplify right side
    1,227.21x = 822,392.15
  5. Step 5: Solve for x
    x = 822,392.15/1,227.21
  6. Step 6: Final answer
    x = 670.13

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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.