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Finding the Fourth Proportional to 254.57, 351.51 and 199.21

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Solution

The fourth proportional to 254.57, 351.51 and 199.21 is: 275.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.57 : 351.51 = 199.21 : x
  2. Step 2: Convert to fraction form
    254.57/351.51 = 199.21/x
  3. Step 3: Cross multiply
    254.57x = 351.51 × 199.21
  4. Step 4: Simplify right side
    254.57x = 70,021.55
  5. Step 5: Solve for x
    x = 70,021.55/254.57
  6. Step 6: Final answer
    x = 275.06

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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.