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Finding the Fourth Proportional to 253.03, 379.81 and 131.26

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Solution

The fourth proportional to 253.03, 379.81 and 131.26 is: 197.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.03 : 379.81 = 131.26 : x
  2. Step 2: Convert to fraction form
    253.03/379.81 = 131.26/x
  3. Step 3: Cross multiply
    253.03x = 379.81 × 131.26
  4. Step 4: Simplify right side
    253.03x = 49,853.20
  5. Step 5: Solve for x
    x = 49,853.20/253.03
  6. Step 6: Final answer
    x = 197.02

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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.