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Finding the Fourth Proportional to 243.44, 335.92 and 139.94

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Solution

The fourth proportional to 243.44, 335.92 and 139.94 is: 193.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.44 : 335.92 = 139.94 : x
  2. Step 2: Convert to fraction form
    243.44/335.92 = 139.94/x
  3. Step 3: Cross multiply
    243.44x = 335.92 × 139.94
  4. Step 4: Simplify right side
    243.44x = 47,008.64
  5. Step 5: Solve for x
    x = 47,008.64/243.44
  6. Step 6: Final answer
    x = 193.10

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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.