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Finding the Fourth Proportional to 253.82, 347.49 and 247.34

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Solution

The fourth proportional to 253.82, 347.49 and 247.34 is: 338.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.82 : 347.49 = 247.34 : x
  2. Step 2: Convert to fraction form
    253.82/347.49 = 247.34/x
  3. Step 3: Cross multiply
    253.82x = 347.49 × 247.34
  4. Step 4: Simplify right side
    253.82x = 85,946.94
  5. Step 5: Solve for x
    x = 85,946.94/253.82
  6. Step 6: Final answer
    x = 338.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.