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Finding the Fourth Proportional to 822.93, 1,135.62 and 449.91

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Solution

The fourth proportional to 822.93, 1,135.62 and 449.91 is: 620.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.93 : 1,135.62 = 449.91 : x
  2. Step 2: Convert to fraction form
    822.93/1,135.62 = 449.91/x
  3. Step 3: Cross multiply
    822.93x = 1,135.62 × 449.91
  4. Step 4: Simplify right side
    822.93x = 510,926.79
  5. Step 5: Solve for x
    x = 510,926.79/822.93
  6. Step 6: Final answer
    x = 620.86

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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.