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Finding the Fourth Proportional to 822.49, 1,135.05 and 449.49

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Solution

The fourth proportional to 822.49, 1,135.05 and 449.49 is: 620.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.49 : 1,135.05 = 449.49 : x
  2. Step 2: Convert to fraction form
    822.49/1,135.05 = 449.49/x
  3. Step 3: Cross multiply
    822.49x = 1,135.05 × 449.49
  4. Step 4: Simplify right side
    822.49x = 510,193.62
  5. Step 5: Solve for x
    x = 510,193.62/822.49
  6. Step 6: Final answer
    x = 620.31

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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.