Home / 1,930.30-2,896.80-1,238.65

Finding the Fourth Proportional to 1,930.30, 2,896.80 and 1,238.65

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Solution

The fourth proportional to 1,930.30, 2,896.80 and 1,238.65 is: 1,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.30 : 2,896.80 = 1,238.65 : x
  2. Step 2: Convert to fraction form
    1,930.30/2,896.80 = 1,238.65/x
  3. Step 3: Cross multiply
    1,930.30x = 2,896.80 × 1,238.65
  4. Step 4: Simplify right side
    1,930.30x = 3,588,121.32
  5. Step 5: Solve for x
    x = 3,588,121.32/1,930.30
  6. Step 6: Final answer
    x = 1,858.84

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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.