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Finding the Fourth Proportional to 605.88, 835.64 and 396.12

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Solution

The fourth proportional to 605.88, 835.64 and 396.12 is: 546.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.88 : 835.64 = 396.12 : x
  2. Step 2: Convert to fraction form
    605.88/835.64 = 396.12/x
  3. Step 3: Cross multiply
    605.88x = 835.64 × 396.12
  4. Step 4: Simplify right side
    605.88x = 331,013.72
  5. Step 5: Solve for x
    x = 331,013.72/605.88
  6. Step 6: Final answer
    x = 546.34

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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.