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Finding the Fourth Proportional to 1,926.78, 2,889.38 and 693.80

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Solution

The fourth proportional to 1,926.78, 2,889.38 and 693.80 is: 1,040.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,926.78 : 2,889.38 = 693.80 : x
  2. Step 2: Convert to fraction form
    1,926.78/2,889.38 = 693.80/x
  3. Step 3: Cross multiply
    1,926.78x = 2,889.38 × 693.80
  4. Step 4: Simplify right side
    1,926.78x = 2,004,651.84
  5. Step 5: Solve for x
    x = 2,004,651.84/1,926.78
  6. Step 6: Final answer
    x = 1,040.42

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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.