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Finding the Fourth Proportional to 605.21, 834.98 and 356.40

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Solution

The fourth proportional to 605.21, 834.98 and 356.40 is: 491.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.21 : 834.98 = 356.40 : x
  2. Step 2: Convert to fraction form
    605.21/834.98 = 356.40/x
  3. Step 3: Cross multiply
    605.21x = 834.98 × 356.40
  4. Step 4: Simplify right side
    605.21x = 297,585.09
  5. Step 5: Solve for x
    x = 297,585.09/605.21
  6. Step 6: Final answer
    x = 491.71

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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.