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Finding the Fourth Proportional to 1,863.78, 2,796.35 and 986.33

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Solution

The fourth proportional to 1,863.78, 2,796.35 and 986.33 is: 1,479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.78 : 2,796.35 = 986.33 : x
  2. Step 2: Convert to fraction form
    1,863.78/2,796.35 = 986.33/x
  3. Step 3: Cross multiply
    1,863.78x = 2,796.35 × 986.33
  4. Step 4: Simplify right side
    1,863.78x = 2,758,104.98
  5. Step 5: Solve for x
    x = 2,758,104.98/1,863.78
  6. Step 6: Final answer
    x = 1,479.84

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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.