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Finding the Fourth Proportional to 351.43, 485.17 and 245.25

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Solution

The fourth proportional to 351.43, 485.17 and 245.25 is: 338.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.43 : 485.17 = 245.25 : x
  2. Step 2: Convert to fraction form
    351.43/485.17 = 245.25/x
  3. Step 3: Cross multiply
    351.43x = 485.17 × 245.25
  4. Step 4: Simplify right side
    351.43x = 118,987.33
  5. Step 5: Solve for x
    x = 118,987.33/351.43
  6. Step 6: Final answer
    x = 338.58

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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.