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Finding the Fourth Proportional to 822.66, 1,133.64 and 812.44

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Solution

The fourth proportional to 822.66, 1,133.64 and 812.44 is: 1,119.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.66 : 1,133.64 = 812.44 : x
  2. Step 2: Convert to fraction form
    822.66/1,133.64 = 812.44/x
  3. Step 3: Cross multiply
    822.66x = 1,133.64 × 812.44
  4. Step 4: Simplify right side
    822.66x = 921,014.48
  5. Step 5: Solve for x
    x = 921,014.48/822.66
  6. Step 6: Final answer
    x = 1,119.56

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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.