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Finding the Fourth Proportional to 243.12, 335.21 and 203.93

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Solution

The fourth proportional to 243.12, 335.21 and 203.93 is: 281.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.12 : 335.21 = 203.93 : x
  2. Step 2: Convert to fraction form
    243.12/335.21 = 203.93/x
  3. Step 3: Cross multiply
    243.12x = 335.21 × 203.93
  4. Step 4: Simplify right side
    243.12x = 68,356.68
  5. Step 5: Solve for x
    x = 68,356.68/243.12
  6. Step 6: Final answer
    x = 281.16

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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.