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Finding the Fourth Proportional to 822.38, 1,229.03 and 659.30

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Solution

The fourth proportional to 822.38, 1,229.03 and 659.30 is: 985.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.38 : 1,229.03 = 659.30 : x
  2. Step 2: Convert to fraction form
    822.38/1,229.03 = 659.30/x
  3. Step 3: Cross multiply
    822.38x = 1,229.03 × 659.30
  4. Step 4: Simplify right side
    822.38x = 810,292.51
  5. Step 5: Solve for x
    x = 810,292.51/822.38
  6. Step 6: Final answer
    x = 985.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.