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Finding the Fourth Proportional to 822.66, 1,135.22 and 449.62

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Solution

The fourth proportional to 822.66, 1,135.22 and 449.62 is: 620.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.66 : 1,135.22 = 449.62 : x
  2. Step 2: Convert to fraction form
    822.66/1,135.22 = 449.62/x
  3. Step 3: Cross multiply
    822.66x = 1,135.22 × 449.62
  4. Step 4: Simplify right side
    822.66x = 510,417.62
  5. Step 5: Solve for x
    x = 510,417.62/822.66
  6. Step 6: Final answer
    x = 620.45

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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.