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Finding the Fourth Proportional to 625.73, 936.68 and 393.84

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Solution

The fourth proportional to 625.73, 936.68 and 393.84 is: 589.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.73 : 936.68 = 393.84 : x
  2. Step 2: Convert to fraction form
    625.73/936.68 = 393.84/x
  3. Step 3: Cross multiply
    625.73x = 936.68 × 393.84
  4. Step 4: Simplify right side
    625.73x = 368,900.08
  5. Step 5: Solve for x
    x = 368,900.08/625.73
  6. Step 6: Final answer
    x = 589.56

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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.