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Finding the Fourth Proportional to 605.72, 835.88 and 357.21

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Solution

The fourth proportional to 605.72, 835.88 and 357.21 is: 492.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.72 : 835.88 = 357.21 : x
  2. Step 2: Convert to fraction form
    605.72/835.88 = 357.21/x
  3. Step 3: Cross multiply
    605.72x = 835.88 × 357.21
  4. Step 4: Simplify right side
    605.72x = 298,582.91
  5. Step 5: Solve for x
    x = 298,582.91/605.72
  6. Step 6: Final answer
    x = 492.94

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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.