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Finding the Fourth Proportional to 605.34, 835.86 and 395.70

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Solution

The fourth proportional to 605.34, 835.86 and 395.70 is: 546.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.34 : 835.86 = 395.70 : x
  2. Step 2: Convert to fraction form
    605.34/835.86 = 395.70/x
  3. Step 3: Cross multiply
    605.34x = 835.86 × 395.70
  4. Step 4: Simplify right side
    605.34x = 330,749.80
  5. Step 5: Solve for x
    x = 330,749.80/605.34
  6. Step 6: Final answer
    x = 546.39

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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.