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Finding the Fourth Proportional to 573.34, 791.21 and 311.36

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Solution

The fourth proportional to 573.34, 791.21 and 311.36 is: 429.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.34 : 791.21 = 311.36 : x
  2. Step 2: Convert to fraction form
    573.34/791.21 = 311.36/x
  3. Step 3: Cross multiply
    573.34x = 791.21 × 311.36
  4. Step 4: Simplify right side
    573.34x = 246,351.15
  5. Step 5: Solve for x
    x = 246,351.15/573.34
  6. Step 6: Final answer
    x = 429.68

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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.