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Finding the Fourth Proportional to 243.78, 336.84 and 170.34

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Solution

The fourth proportional to 243.78, 336.84 and 170.34 is: 235.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.78 : 336.84 = 170.34 : x
  2. Step 2: Convert to fraction form
    243.78/336.84 = 170.34/x
  3. Step 3: Cross multiply
    243.78x = 336.84 × 170.34
  4. Step 4: Simplify right side
    243.78x = 57,377.33
  5. Step 5: Solve for x
    x = 57,377.33/243.78
  6. Step 6: Final answer
    x = 235.37

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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.