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Finding the Fourth Proportional to 605.75, 835.61 and 493.89

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Solution

The fourth proportional to 605.75, 835.61 and 493.89 is: 681.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.75 : 835.61 = 493.89 : x
  2. Step 2: Convert to fraction form
    605.75/835.61 = 493.89/x
  3. Step 3: Cross multiply
    605.75x = 835.61 × 493.89
  4. Step 4: Simplify right side
    605.75x = 412,695.24
  5. Step 5: Solve for x
    x = 412,695.24/605.75
  6. Step 6: Final answer
    x = 681.30

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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.