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Finding the Fourth Proportional to 605.73, 836.30 and 385

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Solution

The fourth proportional to 605.73, 836.30 and 385 is: 531.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.73 : 836.30 = 385 : x
  2. Step 2: Convert to fraction form
    605.73/836.30 = 385/x
  3. Step 3: Cross multiply
    605.73x = 836.30 × 385
  4. Step 4: Simplify right side
    605.73x = 321,975.50
  5. Step 5: Solve for x
    x = 321,975.50/605.73
  6. Step 6: Final answer
    x = 531.55

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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.