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Finding the Fourth Proportional to 254.82, 351.33 and 189.30

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Solution

The fourth proportional to 254.82, 351.33 and 189.30 is: 261.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.82 : 351.33 = 189.30 : x
  2. Step 2: Convert to fraction form
    254.82/351.33 = 189.30/x
  3. Step 3: Cross multiply
    254.82x = 351.33 × 189.30
  4. Step 4: Simplify right side
    254.82x = 66,506.77
  5. Step 5: Solve for x
    x = 66,506.77/254.82
  6. Step 6: Final answer
    x = 261.00

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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.