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Finding the Fourth Proportional to 254.12, 379.46 and 199.40

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Solution

The fourth proportional to 254.12, 379.46 and 199.40 is: 297.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.12 : 379.46 = 199.40 : x
  2. Step 2: Convert to fraction form
    254.12/379.46 = 199.40/x
  3. Step 3: Cross multiply
    254.12x = 379.46 × 199.40
  4. Step 4: Simplify right side
    254.12x = 75,664.32
  5. Step 5: Solve for x
    x = 75,664.32/254.12
  6. Step 6: Final answer
    x = 297.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.