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Finding the Fourth Proportional to 891.72, 1,229.28 and 596.88

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Solution

The fourth proportional to 891.72, 1,229.28 and 596.88 is: 822.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.72 : 1,229.28 = 596.88 : x
  2. Step 2: Convert to fraction form
    891.72/1,229.28 = 596.88/x
  3. Step 3: Cross multiply
    891.72x = 1,229.28 × 596.88
  4. Step 4: Simplify right side
    891.72x = 733,732.65
  5. Step 5: Solve for x
    x = 733,732.65/891.72
  6. Step 6: Final answer
    x = 822.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.