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Finding the Fourth Proportional to 2,236.91, 3,355.43 and 938.48

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Solution

The fourth proportional to 2,236.91, 3,355.43 and 938.48 is: 1,407.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,236.91 : 3,355.43 = 938.48 : x
  2. Step 2: Convert to fraction form
    2,236.91/3,355.43 = 938.48/x
  3. Step 3: Cross multiply
    2,236.91x = 3,355.43 × 938.48
  4. Step 4: Simplify right side
    2,236.91x = 3,148,982.48
  5. Step 5: Solve for x
    x = 3,148,982.48/2,236.91
  6. Step 6: Final answer
    x = 1,407.74

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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.