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Finding the Fourth Proportional to 3,403.61, 5,105.71 and 938.44

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Solution

The fourth proportional to 3,403.61, 5,105.71 and 938.44 is: 1,407.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,403.61 : 5,105.71 = 938.44 : x
  2. Step 2: Convert to fraction form
    3,403.61/5,105.71 = 938.44/x
  3. Step 3: Cross multiply
    3,403.61x = 5,105.71 × 938.44
  4. Step 4: Simplify right side
    3,403.61x = 4,791,376.96
  5. Step 5: Solve for x
    x = 4,791,376.96/3,403.61
  6. Step 6: Final answer
    x = 1,407.73

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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.