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Finding the Fourth Proportional to 254.67, 351.36 and 199.55

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Solution

The fourth proportional to 254.67, 351.36 and 199.55 is: 275.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.67 : 351.36 = 199.55 : x
  2. Step 2: Convert to fraction form
    254.67/351.36 = 199.55/x
  3. Step 3: Cross multiply
    254.67x = 351.36 × 199.55
  4. Step 4: Simplify right side
    254.67x = 70,112.13
  5. Step 5: Solve for x
    x = 70,112.13/254.67
  6. Step 6: Final answer
    x = 275.31

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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.