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Finding the Fourth Proportional to 573.54, 791.49 and 311.55

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Solution

The fourth proportional to 573.54, 791.49 and 311.55 is: 429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.54 : 791.49 = 311.55 : x
  2. Step 2: Convert to fraction form
    573.54/791.49 = 311.55/x
  3. Step 3: Cross multiply
    573.54x = 791.49 × 311.55
  4. Step 4: Simplify right side
    573.54x = 246,591.84
  5. Step 5: Solve for x
    x = 246,591.84/573.54
  6. Step 6: Final answer
    x = 429.95

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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.