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Finding the Fourth Proportional to 625.67, 936.87 and 405.96

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Solution

The fourth proportional to 625.67, 936.87 and 405.96 is: 607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.67 : 936.87 = 405.96 : x
  2. Step 2: Convert to fraction form
    625.67/936.87 = 405.96/x
  3. Step 3: Cross multiply
    625.67x = 936.87 × 405.96
  4. Step 4: Simplify right side
    625.67x = 380,331.75
  5. Step 5: Solve for x
    x = 380,331.75/625.67
  6. Step 6: Final answer
    x = 607.88

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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.