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Finding the Fourth Proportional to 822.73, 1,135.36 and 449.71

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Solution

The fourth proportional to 822.73, 1,135.36 and 449.71 is: 620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.73 : 1,135.36 = 449.71 : x
  2. Step 2: Convert to fraction form
    822.73/1,135.36 = 449.71/x
  3. Step 3: Cross multiply
    822.73x = 1,135.36 × 449.71
  4. Step 4: Simplify right side
    822.73x = 510,582.75
  5. Step 5: Solve for x
    x = 510,582.75/822.73
  6. Step 6: Final answer
    x = 620.60

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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.