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Finding the Fourth Proportional to 392.96, 541.70 and 245.34

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Solution

The fourth proportional to 392.96, 541.70 and 245.34 is: 338.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.96 : 541.70 = 245.34 : x
  2. Step 2: Convert to fraction form
    392.96/541.70 = 245.34/x
  3. Step 3: Cross multiply
    392.96x = 541.70 × 245.34
  4. Step 4: Simplify right side
    392.96x = 132,900.37
  5. Step 5: Solve for x
    x = 132,900.37/392.96
  6. Step 6: Final answer
    x = 338.20

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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.