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Finding the Fourth Proportional to 822.42, 1,132.99 and 573.29

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Solution

The fourth proportional to 822.42, 1,132.99 and 573.29 is: 789.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.42 : 1,132.99 = 573.29 : x
  2. Step 2: Convert to fraction form
    822.42/1,132.99 = 573.29/x
  3. Step 3: Cross multiply
    822.42x = 1,132.99 × 573.29
  4. Step 4: Simplify right side
    822.42x = 649,528.99
  5. Step 5: Solve for x
    x = 649,528.99/822.42
  6. Step 6: Final answer
    x = 789.78

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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.