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Finding the Fourth Proportional to 573.81, 791.85 and 311.82

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Solution

The fourth proportional to 573.81, 791.85 and 311.82 is: 430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.81 : 791.85 = 311.82 : x
  2. Step 2: Convert to fraction form
    573.81/791.85 = 311.82/x
  3. Step 3: Cross multiply
    573.81x = 791.85 × 311.82
  4. Step 4: Simplify right side
    573.81x = 246,914.67
  5. Step 5: Solve for x
    x = 246,914.67/573.81
  6. Step 6: Final answer
    x = 430.31

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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.