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Finding the Fourth Proportional to 253.81, 350.28 and 143.29

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Solution

The fourth proportional to 253.81, 350.28 and 143.29 is: 197.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.81 : 350.28 = 143.29 : x
  2. Step 2: Convert to fraction form
    253.81/350.28 = 143.29/x
  3. Step 3: Cross multiply
    253.81x = 350.28 × 143.29
  4. Step 4: Simplify right side
    253.81x = 50,191.62
  5. Step 5: Solve for x
    x = 50,191.62/253.81
  6. Step 6: Final answer
    x = 197.75

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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.