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Finding the Fourth Proportional to 936.84, 1,405.22 and 443.10

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Solution

The fourth proportional to 936.84, 1,405.22 and 443.10 is: 664.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.84 : 1,405.22 = 443.10 : x
  2. Step 2: Convert to fraction form
    936.84/1,405.22 = 443.10/x
  3. Step 3: Cross multiply
    936.84x = 1,405.22 × 443.10
  4. Step 4: Simplify right side
    936.84x = 622,647.92
  5. Step 5: Solve for x
    x = 622,647.92/936.84
  6. Step 6: Final answer
    x = 664.63

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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.