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Finding the Fourth Proportional to 253.41, 379.58 and 131.42

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Solution

The fourth proportional to 253.41, 379.58 and 131.42 is: 196.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.41 : 379.58 = 131.42 : x
  2. Step 2: Convert to fraction form
    253.41/379.58 = 131.42/x
  3. Step 3: Cross multiply
    253.41x = 379.58 × 131.42
  4. Step 4: Simplify right side
    253.41x = 49,881.85
  5. Step 5: Solve for x
    x = 49,881.85/253.41
  6. Step 6: Final answer
    x = 196.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.