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Finding the Fourth Proportional to 353.16, 486.82 and 254.92

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Solution

The fourth proportional to 353.16, 486.82 and 254.92 is: 351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.16 : 486.82 = 254.92 : x
  2. Step 2: Convert to fraction form
    353.16/486.82 = 254.92/x
  3. Step 3: Cross multiply
    353.16x = 486.82 × 254.92
  4. Step 4: Simplify right side
    353.16x = 124,100.15
  5. Step 5: Solve for x
    x = 124,100.15/353.16
  6. Step 6: Final answer
    x = 351.40

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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.