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Finding the Fourth Proportional to 393.54, 541.76 and 341.78

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Solution

The fourth proportional to 393.54, 541.76 and 341.78 is: 470.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.54 : 541.76 = 341.78 : x
  2. Step 2: Convert to fraction form
    393.54/541.76 = 341.78/x
  3. Step 3: Cross multiply
    393.54x = 541.76 × 341.78
  4. Step 4: Simplify right side
    393.54x = 185,162.73
  5. Step 5: Solve for x
    x = 185,162.73/393.54
  6. Step 6: Final answer
    x = 470.51

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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.