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Finding the Fourth Proportional to 821.91, 1,233.07 and 244.79

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Solution

The fourth proportional to 821.91, 1,233.07 and 244.79 is: 367.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.91 : 1,233.07 = 244.79 : x
  2. Step 2: Convert to fraction form
    821.91/1,233.07 = 244.79/x
  3. Step 3: Cross multiply
    821.91x = 1,233.07 × 244.79
  4. Step 4: Simplify right side
    821.91x = 301,843.21
  5. Step 5: Solve for x
    x = 301,843.21/821.91
  6. Step 6: Final answer
    x = 367.25

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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.