Home / 820,635.99-1,231,016.22-221,588.43

Finding the Fourth Proportional to 820,635.99, 1,231,016.22 and 221,588.43

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Solution

The fourth proportional to 820,635.99, 1,231,016.22 and 221,588.43 is: 332,399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,635.99 : 1,231,016.22 = 221,588.43 : x
  2. Step 2: Convert to fraction form
    820,635.99/1,231,016.22 = 221,588.43/x
  3. Step 3: Cross multiply
    820,635.99x = 1,231,016.22 × 221,588.43
  4. Step 4: Simplify right side
    820,635.99x = 272,778,951,494.34
  5. Step 5: Solve for x
    x = 272,778,951,494.34/820,635.99
  6. Step 6: Final answer
    x = 332,399.45

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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.