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Finding the Fourth Proportional to 605.86, 836.34 and 409

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Solution

The fourth proportional to 605.86, 836.34 and 409 is: 564.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.86 : 836.34 = 409 : x
  2. Step 2: Convert to fraction form
    605.86/836.34 = 409/x
  3. Step 3: Cross multiply
    605.86x = 836.34 × 409
  4. Step 4: Simplify right side
    605.86x = 342,063.06
  5. Step 5: Solve for x
    x = 342,063.06/605.86
  6. Step 6: Final answer
    x = 564.59

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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.