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Finding the Fourth Proportional to 393.20, 541.46 and 351.74

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Solution

The fourth proportional to 393.20, 541.46 and 351.74 is: 484.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.20 : 541.46 = 351.74 : x
  2. Step 2: Convert to fraction form
    393.20/541.46 = 351.74/x
  3. Step 3: Cross multiply
    393.20x = 541.46 × 351.74
  4. Step 4: Simplify right side
    393.20x = 190,453.14
  5. Step 5: Solve for x
    x = 190,453.14/393.20
  6. Step 6: Final answer
    x = 484.37

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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.