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Finding the Fourth Proportional to 231.16, 318.99 and 137.97

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Solution

The fourth proportional to 231.16, 318.99 and 137.97 is: 190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.16 : 318.99 = 137.97 : x
  2. Step 2: Convert to fraction form
    231.16/318.99 = 137.97/x
  3. Step 3: Cross multiply
    231.16x = 318.99 × 137.97
  4. Step 4: Simplify right side
    231.16x = 44,011.05
  5. Step 5: Solve for x
    x = 44,011.05/231.16
  6. Step 6: Final answer
    x = 190.39

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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.