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Finding the Fourth Proportional to 343.56, 474.06 and 255.09

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Solution

The fourth proportional to 343.56, 474.06 and 255.09 is: 351.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.56 : 474.06 = 255.09 : x
  2. Step 2: Convert to fraction form
    343.56/474.06 = 255.09/x
  3. Step 3: Cross multiply
    343.56x = 474.06 × 255.09
  4. Step 4: Simplify right side
    343.56x = 120,927.97
  5. Step 5: Solve for x
    x = 120,927.97/343.56
  6. Step 6: Final answer
    x = 351.98

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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.