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Finding the Fourth Proportional to 1,704.56, 2,556.78 and 939.92

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Solution

The fourth proportional to 1,704.56, 2,556.78 and 939.92 is: 1,409.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,704.56 : 2,556.78 = 939.92 : x
  2. Step 2: Convert to fraction form
    1,704.56/2,556.78 = 939.92/x
  3. Step 3: Cross multiply
    1,704.56x = 2,556.78 × 939.92
  4. Step 4: Simplify right side
    1,704.56x = 2,403,168.66
  5. Step 5: Solve for x
    x = 2,403,168.66/1,704.56
  6. Step 6: Final answer
    x = 1,409.85

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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.