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Finding the Fourth Proportional to 822.99, 1,135.72 and 449.97

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Solution

The fourth proportional to 822.99, 1,135.72 and 449.97 is: 620.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.99 : 1,135.72 = 449.97 : x
  2. Step 2: Convert to fraction form
    822.99/1,135.72 = 449.97/x
  3. Step 3: Cross multiply
    822.99x = 1,135.72 × 449.97
  4. Step 4: Simplify right side
    822.99x = 511,034.25
  5. Step 5: Solve for x
    x = 511,034.25/822.99
  6. Step 6: Final answer
    x = 620.95

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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.