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Finding the Fourth Proportional to 605.41, 908.69 and 389.11

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Solution

The fourth proportional to 605.41, 908.69 and 389.11 is: 584.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.41 : 908.69 = 389.11 : x
  2. Step 2: Convert to fraction form
    605.41/908.69 = 389.11/x
  3. Step 3: Cross multiply
    605.41x = 908.69 × 389.11
  4. Step 4: Simplify right side
    605.41x = 353,578.42
  5. Step 5: Solve for x
    x = 353,578.42/605.41
  6. Step 6: Final answer
    x = 584.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.