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Finding the Fourth Proportional to 392.56, 541.86 and 245.44

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Solution

The fourth proportional to 392.56, 541.86 and 245.44 is: 338.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.56 : 541.86 = 245.44 : x
  2. Step 2: Convert to fraction form
    392.56/541.86 = 245.44/x
  3. Step 3: Cross multiply
    392.56x = 541.86 × 245.44
  4. Step 4: Simplify right side
    392.56x = 132,994.12
  5. Step 5: Solve for x
    x = 132,994.12/392.56
  6. Step 6: Final answer
    x = 338.79

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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.