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Finding the Fourth Proportional to 605.58, 835.68 and 439.74

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Solution

The fourth proportional to 605.58, 835.68 and 439.74 is: 606.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.58 : 835.68 = 439.74 : x
  2. Step 2: Convert to fraction form
    605.58/835.68 = 439.74/x
  3. Step 3: Cross multiply
    605.58x = 835.68 × 439.74
  4. Step 4: Simplify right side
    605.58x = 367,481.92
  5. Step 5: Solve for x
    x = 367,481.92/605.58
  6. Step 6: Final answer
    x = 606.83

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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.