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Finding the Fourth Proportional to 1,939.59, 2,893.11 and 1,780.38

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Solution

The fourth proportional to 1,939.59, 2,893.11 and 1,780.38 is: 2,655.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.59 : 2,893.11 = 1,780.38 : x
  2. Step 2: Convert to fraction form
    1,939.59/2,893.11 = 1,780.38/x
  3. Step 3: Cross multiply
    1,939.59x = 2,893.11 × 1,780.38
  4. Step 4: Simplify right side
    1,939.59x = 5,150,835.18
  5. Step 5: Solve for x
    x = 5,150,835.18/1,939.59
  6. Step 6: Final answer
    x = 2,655.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.