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Finding the Fourth Proportional to 821.30, 1,229.04 and 673.26

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Solution

The fourth proportional to 821.30, 1,229.04 and 673.26 is: 1,007.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.30 : 1,229.04 = 673.26 : x
  2. Step 2: Convert to fraction form
    821.30/1,229.04 = 673.26/x
  3. Step 3: Cross multiply
    821.30x = 1,229.04 × 673.26
  4. Step 4: Simplify right side
    821.30x = 827,463.47
  5. Step 5: Solve for x
    x = 827,463.47/821.30
  6. Step 6: Final answer
    x = 1,007.51

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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.