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Finding the Fourth Proportional to 439.15, 605.91 and 252.64

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Solution

The fourth proportional to 439.15, 605.91 and 252.64 is: 348.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.15 : 605.91 = 252.64 : x
  2. Step 2: Convert to fraction form
    439.15/605.91 = 252.64/x
  3. Step 3: Cross multiply
    439.15x = 605.91 × 252.64
  4. Step 4: Simplify right side
    439.15x = 153,078.38
  5. Step 5: Solve for x
    x = 153,078.38/439.15
  6. Step 6: Final answer
    x = 348.58

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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.