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Finding the Fourth Proportional to 605.16, 835.23 and 395.91

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Solution

The fourth proportional to 605.16, 835.23 and 395.91 is: 546.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.16 : 835.23 = 395.91 : x
  2. Step 2: Convert to fraction form
    605.16/835.23 = 395.91/x
  3. Step 3: Cross multiply
    605.16x = 835.23 × 395.91
  4. Step 4: Simplify right side
    605.16x = 330,675.91
  5. Step 5: Solve for x
    x = 330,675.91/605.16
  6. Step 6: Final answer
    x = 546.43

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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.