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Finding the Fourth Proportional to 230.98, 318.77 and 131.42

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Solution

The fourth proportional to 230.98, 318.77 and 131.42 is: 181.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.98 : 318.77 = 131.42 : x
  2. Step 2: Convert to fraction form
    230.98/318.77 = 131.42/x
  3. Step 3: Cross multiply
    230.98x = 318.77 × 131.42
  4. Step 4: Simplify right side
    230.98x = 41,893.62
  5. Step 5: Solve for x
    x = 41,893.62/230.98
  6. Step 6: Final answer
    x = 181.38

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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.