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Finding the Fourth Proportional to 3,404.96, 5,106.53 and 939.20

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Solution

The fourth proportional to 3,404.96, 5,106.53 and 939.20 is: 1,408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,404.96 : 5,106.53 = 939.20 : x
  2. Step 2: Convert to fraction form
    3,404.96/5,106.53 = 939.20/x
  3. Step 3: Cross multiply
    3,404.96x = 5,106.53 × 939.20
  4. Step 4: Simplify right side
    3,404.96x = 4,796,052.98
  5. Step 5: Solve for x
    x = 4,796,052.98/3,404.96
  6. Step 6: Final answer
    x = 1,408.55

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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.