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Finding the Fourth Proportional to 254.51, 351.22 and 138.07

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Solution

The fourth proportional to 254.51, 351.22 and 138.07 is: 190.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.51 : 351.22 = 138.07 : x
  2. Step 2: Convert to fraction form
    254.51/351.22 = 138.07/x
  3. Step 3: Cross multiply
    254.51x = 351.22 × 138.07
  4. Step 4: Simplify right side
    254.51x = 48,493.82
  5. Step 5: Solve for x
    x = 48,493.82/254.51
  6. Step 6: Final answer
    x = 190.54

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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.