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Finding the Fourth Proportional to 253.69, 350.09 and 137.25

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Solution

The fourth proportional to 253.69, 350.09 and 137.25 is: 189.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.69 : 350.09 = 137.25 : x
  2. Step 2: Convert to fraction form
    253.69/350.09 = 137.25/x
  3. Step 3: Cross multiply
    253.69x = 350.09 × 137.25
  4. Step 4: Simplify right side
    253.69x = 48,049.68
  5. Step 5: Solve for x
    x = 48,049.68/253.69
  6. Step 6: Final answer
    x = 189.41

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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.