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Finding the Fourth Proportional to 1,939.87, 2,910.03 and 623.89

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Solution

The fourth proportional to 1,939.87, 2,910.03 and 623.89 is: 935.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.87 : 2,910.03 = 623.89 : x
  2. Step 2: Convert to fraction form
    1,939.87/2,910.03 = 623.89/x
  3. Step 3: Cross multiply
    1,939.87x = 2,910.03 × 623.89
  4. Step 4: Simplify right side
    1,939.87x = 1,815,538.62
  5. Step 5: Solve for x
    x = 1,815,538.62/1,939.87
  6. Step 6: Final answer
    x = 935.91

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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.