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Finding the Fourth Proportional to 254.09, 350.65 and 137.65

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Solution

The fourth proportional to 254.09, 350.65 and 137.65 is: 189.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.09 : 350.65 = 137.65 : x
  2. Step 2: Convert to fraction form
    254.09/350.65 = 137.65/x
  3. Step 3: Cross multiply
    254.09x = 350.65 × 137.65
  4. Step 4: Simplify right side
    254.09x = 48,267.16
  5. Step 5: Solve for x
    x = 48,267.16/254.09
  6. Step 6: Final answer
    x = 189.96

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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.