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Finding the Fourth Proportional to 394.86, 542.97 and 351.12

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Solution

The fourth proportional to 394.86, 542.97 and 351.12 is: 482.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.86 : 542.97 = 351.12 : x
  2. Step 2: Convert to fraction form
    394.86/542.97 = 351.12/x
  3. Step 3: Cross multiply
    394.86x = 542.97 × 351.12
  4. Step 4: Simplify right side
    394.86x = 190,647.63
  5. Step 5: Solve for x
    x = 190,647.63/394.86
  6. Step 6: Final answer
    x = 482.82

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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.