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Finding the Fourth Proportional to 255.51, 349.92 and 243.18

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Solution

The fourth proportional to 255.51, 349.92 and 243.18 is: 333.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.51 : 349.92 = 243.18 : x
  2. Step 2: Convert to fraction form
    255.51/349.92 = 243.18/x
  3. Step 3: Cross multiply
    255.51x = 349.92 × 243.18
  4. Step 4: Simplify right side
    255.51x = 85,093.55
  5. Step 5: Solve for x
    x = 85,093.55/255.51
  6. Step 6: Final answer
    x = 333.03

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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.