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Finding the Fourth Proportional to 1,951.88, 2,693.79 and 1,288.89

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Solution

The fourth proportional to 1,951.88, 2,693.79 and 1,288.89 is: 1,778.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.88 : 2,693.79 = 1,288.89 : x
  2. Step 2: Convert to fraction form
    1,951.88/2,693.79 = 1,288.89/x
  3. Step 3: Cross multiply
    1,951.88x = 2,693.79 × 1,288.89
  4. Step 4: Simplify right side
    1,951.88x = 3,471,998.99
  5. Step 5: Solve for x
    x = 3,471,998.99/1,951.88
  6. Step 6: Final answer
    x = 1,778.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.