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Finding the Fourth Proportional to 605.72, 835.08 and 395.48

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Solution

The fourth proportional to 605.72, 835.08 and 395.48 is: 545.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.72 : 835.08 = 395.48 : x
  2. Step 2: Convert to fraction form
    605.72/835.08 = 395.48/x
  3. Step 3: Cross multiply
    605.72x = 835.08 × 395.48
  4. Step 4: Simplify right side
    605.72x = 330,257.44
  5. Step 5: Solve for x
    x = 330,257.44/605.72
  6. Step 6: Final answer
    x = 545.23

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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.