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Finding the Fourth Proportional to 394.78, 592.39 and 163.63

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Solution

The fourth proportional to 394.78, 592.39 and 163.63 is: 245.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.78 : 592.39 = 163.63 : x
  2. Step 2: Convert to fraction form
    394.78/592.39 = 163.63/x
  3. Step 3: Cross multiply
    394.78x = 592.39 × 163.63
  4. Step 4: Simplify right side
    394.78x = 96,929.81
  5. Step 5: Solve for x
    x = 96,929.81/394.78
  6. Step 6: Final answer
    x = 245.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.